De-icing competency check: how to assess winter operations training
A de-icing competency check is a documented decision that a person can carry out, supervise or check ground de-icing tasks to the operator’s standard, made from evidence beyond a certificate of attendance. This guide shows how to build one for winter operations training: what the FAA, EASA and SAE say, which evidence fits each role, and how to keep it current each season.
It is written for training managers, quality managers and chief instructors at ground handling companies, airline stations and de-icing service providers, and for training companies that sell winter operations courses. You will get a source comparison, a role-by-evidence matrix, a scored practical check and a season-start refresh plan.
This is assessment design, not operational or airworthiness advice, and it contains no de-icing procedures. Rules differ by country and operator, so check your competent authority and approved procedures. The facts below were checked on 1 November 2026.
Key takeaways
- The US rule, 14 CFR 121.629(c)(2), calls for “initial and annual recurrent ground training and testing” for flight crew and “qualification” for other affected personnel; none of the sources checked sets a test format or pass mark for ground staff, so you define the evidence.
- Knowledge items suit holdover time, contamination and communication topics, but only an observed task shows someone can do the work, so use both.
- SAE AS6286 Revision E (May 2026) sets minimum training and qualification requirements, but its public abstract describes no test methods or intervals.
- Tag every item to the season’s published data and re-check the bank before each winter, because holdover guidance and fluid information change.
What is a de-icing competency check, and what does it have to prove?
A de-icing competency check proves three separate things: the person knows the process, can perform their part of it safely under real conditions, and is current for this season. Each needs different evidence, so one end-of-course quiz or an attendance certificate cannot carry all three.
Knows is tested with items, including scenario items. Does is observed by a qualified assessor against a checklist. Is current is a record of the last check plus a trigger for the next.
What do the FAA, EASA and SAE say about training and testing for de-icing staff?
Only part of this is law. As of November 2026, the US rule requires training and qualification wherever an operator needs a ground de-icing program, EASA expects operator procedures and trained, qualified people, and SAE AS6286 is an industry standard. None of the sources checked sets a test format or pass mark for ground staff.
The table shows what each source says about training and assessment, and who decides whether it binds you.
| Source | What it says (as of November 2026) | Who decides, and what is left open |
|---|---|---|
| 14 CFR 121.629(c)(2) (US) | An approved ground deicing/anti-icing program must include “initial and annual recurrent ground training and testing for flight crewmembers” and “qualification for all other affected personnel (e.g., aircraft dispatchers, ground crews, contract personnel)” (quoted). | US federal rule for Part 121 certificate holders. It says “testing” for flight crew, “qualification” for the rest, and names no test format. |
| FAA AC 120-60B (December 20, 2004) | Paragraph 6.g(1)(a): “Certificate holders must conduct initial and annual recurrent training for flightcrews, dispatchers, and ground personnel” (quoted). It expects a quality assurance program “to monitor and maintain a high level of competence” and records of training and qualification. | Guidance: FAA calls it one acceptable method, not the only one. No written, practical or observed test is described. |
| EASA CAT.OP.MPA.250 and SIB 2018-12R1 (4 April 2025) | Regulation (EU) No 965/2012 requires operators to “establish procedures to be followed when ground de-icing and anti-icing” (quoted fragment, as EASA cites it). The bulletin asks operators to ensure training follows the applicable procedures and cites a post-treatment check by “a trained and qualified person” (GM2). | EU rule plus a bulletin to operators and national competent authorities. No test format or interval. |
| SAE AS6286E (revised May 27, 2026) | The public abstract says it “establishes the minimum training and qualification requirements for ground-based aircraft deicing methods and procedures” (quoted). As a rule of thumb, practical training time should equal or exceed classroom time. | Industry standard, sold by SAE. It binds you only if your authority, operator or customer says so. The public page gives no test methods or intervals. |
The sources are 14 CFR 121.629 on eCFR, FAA AC 120-60B, EASA SIB 2018-12R1 and the SAE AS6286E listing. Only the public SAE page was read, not the paid standard. Confirm the AC’s paragraph numbers in the PDF.
The texts say what must exist, not how to prove a person is competent. That gap is yours to fill, and your authority or operator may have filled part of it already, so ask first.
Which evidence does each de-icing role need?
Match evidence to what each role does. Items fit knowledge such as holdover time and communication. Observation fits hands-on work and checks. Flight crew and dispatcher evidence usually sits in the operator’s own checking system. The matrix below is an original planning aid, not an SAE or regulator document.
| Role | Knowledge items on | Observed evidence | Example critical fail (illustrative) |
|---|---|---|---|
| De-icing operator | Contamination, fluid types, communication, source of holdover data | Your treatment task, simulated or supervised live, against the approved procedure | Starts treatment without the communication your procedure requires |
| Post-treatment checker | What counts as contamination, which areas the procedure names | The check on a real or training aircraft, findings reported | Declares the check complete without covering the areas named |
| Flight crew and dispatchers | Holdover time use and limits, pre-takeoff checks | Usually the operator’s line or simulator checking | Treats a holdover time as proof the surfaces are clean |
| Contract or supervised staff | The operator’s program, who supervises | A supervised task with sign-off | Works outside their recorded qualification |
Replace the critical-fail column with failures from your own procedures and occurrence reports. One training vendor’s blog says Revision E recognizes more qualification levels, from DI-L10 to DI-L140, from August 2026. That is a vendor summary, so check your roles against the standard itself.
How do you write de-icing knowledge items that test understanding, not recall?
Write scenario items around a decision, and key each to a source your trainees have, such as your approved procedure or the season’s holdover data. A recall item asks for a definition; a scenario item asks what a number means or what to do next. See the guide to scenario-based multiple-choice questions.
Here is an original, illustrative item. It is not drawn from any official exam, manual or question bank, and it is not representative of one.
Item 1 (understanding: flight crew and dispatchers) A holdover time table lists a range for the current conditions. Which statement is best? A. The holdover time guarantees the critical surfaces stay clear until it ends B. The holdover time estimates how long treatment will prevent frost or ice forming, and it is used with the checks in your approved procedures C. The holdover time makes a pre-takeoff check unnecessary D. The holdover time is set by the person who applies the fluid Key: B. Distractor A is the common misreading of an estimate as a guarantee.
The key follows the regulation’s definition of holdover time as “the estimated time deicing/anti-icing fluid will prevent the formation of frost or ice” (14 CFR 121.629(c)(3), quoted). AC 120-60B also warns crews not to rely on holdover times “as the sole determinant that the aircraft is free of contaminants” (quoted).
Holdover data is published per season: EASA’s SIB 2025-09 of 28 November 2025 refers to the FAA and Transport Canada holdover time guidelines for Winter 2025-2026. An item keyed to last winter’s table can quietly become wrong.
Pro tip: Version Items to the Season. Add a source and season tag to every item that depends on holdover data, fluid information or a procedure revision, and set a review date before the season starts. Without tags, an old key can mark a correct answer wrong and nobody notices until a trainee disputes it.
How do you run the practical de-icing competency check and decide who is qualified?
Run the practical as a pass-or-not-yet decision on a checklist written before the first observation, with critical items that fail the whole task. A percentage score hides the one miss that matters. Record the conditions and procedure version.
The method for wording criteria and calibrating assessors is in the guide to observation checklists for practical training. The table is a behavior-level example. Map each row to your approved procedure, and never use it as a procedure.
| Tier | Criterion (illustrative; map to your approved procedure) |
|---|---|
| Critical 1 | Completes the communication your procedure requires before and after treatment |
| Critical 2 | Stops and reports a suspected equipment, fluid or contamination problem instead of continuing |
| Critical 3 | Covers every area the procedure names during a check, or declares the check incomplete |
| Required 1 | Selects and records the fluid and treatment information the procedure requires |
| Required 2 | Follows the procedure’s order of steps for the task being assessed |
| Supporting | Uses clear, standard phrases with crew and colleagues |
The rule: any critical miss means “not yet competent”, all required items must be met, and supporting items drive feedback. The assessor signs with name, date, conditions and procedure version.
When should de-icing staff be checked again, and what changes before each winter?
The only interval found in the sources checked is annual. The US rule calls for annual recurrent ground training and testing for flight crew, and AC 120-60B says certificate holders must conduct annual recurrent training for flightcrews, dispatchers and ground personnel. Other authorities, SAE and customers may differ, so confirm yours, then add event triggers.
The table sets out a refresh plan. Only the annual rule and the aircraft-configuration row come from a source; the rest is your decision.
| Trigger | What to check | Where the rule comes from |
|---|---|---|
| Start of each winter | Items on current holdover data, fluids and procedures; a short observed task | Annual under the US texts above; timing is your choice. Australia’s CASA inspector worksheet asks whether updated holdover tables reach all personnel before each winter season. |
| Procedure, fluid or equipment change | Items on what changed; observation if the physical task changed | Your decision |
| Different aircraft configuration | Training and a check for that configuration | AC 120-60B 6.b: “specific training is needed” (quoted fragment) |
| Occurrence, audit finding or long absence | Targeted items and an observed task on the area involved | Your decision; the sources checked give no absence thresholds for de-icing |
Expiry dates, grace periods and lapse rules are covered in the recertification and recurrent testing guide, so apply them here.
What records should each de-icing competency check leave behind?
Each check should leave a record that lets an auditor reproduce the decision: who was assessed, in which role, against which procedure and season data, with what evidence, assessed by whom, when, and with what outcome. AC 120-60B says certificate holders shall maintain records of personnel training and qualification.
A practical record set holds:
- the person, employer (contractors included) and role
- the procedure version and the season data edition used
- item results with item versions, and the observed checklist
- the assessor’s name and recorded qualification
- the date, conditions, outcome and next due date
Regulation 121.629(c)(2) names contract personnel among those needing qualification, and CASA’s worksheet asks whether staff and contractors are “trained and qualified”.
Pro tip: Feed Misses Back Into the Program. AC 120-60B calls an ongoing review plan “advisable” to evaluate the effectiveness of the training received. After each winter, group missed items by topic and rewrite the training where several people missed the same item, before next season’s courses start.
Where does assessment software fit in de-icing and winter operations assessment?
Software suits knowledge items, season-tagged item banks, scheduling and results records. It cannot watch a de-icing task, and nothing in the sources checked says a regulator or SAE approves a particular tool. Observation needs a qualified assessor and a form, whichever system stores the result.
SimpliAssess’s features page lists item banking, test management, examinee management, schedule management, tag management, and analytics and reporting, and describes white-label and API-first delivery. The page does not mention offline use, observation checklists, practical assessment or aviation, so confirm those directly before planning around them.
What should you do next?
Pick one role, usually the de-icing operator, and build the three layers for it: six to eight scenario items tagged to the current season, one observed checklist with critical fails, and a record template. Pilot it with two qualified assessors and three staff before the season starts.
After the pilot, compare the assessors’ decisions and rewrite any criterion they read differently. For ramp and loading work alongside winter operations, the ground handling competency assessment guide has a task matrix you can adapt.
If your main problem is knowing who is due before the season starts, SimpliTrain, a separate training platform from the same company, describes on its aviation industry page a training tracker and certification monitor that alerts before safety certifications expire. The page does not mention de-icing or winter operations and does not describe how exams work, so ask about both in a demo before you rely on it.
Frequently asked questions
What is a de-icing competency check?
It is a documented decision that a person can carry out, supervise or check ground de-icing tasks to the operator’s standard. It rests on evidence: knowledge items on topics such as holdover time and contamination, an observed task for hands-on work, and a record showing the person is current for the season.
Do regulators require a written test for de-icing staff?
Not in the texts checked. 14 CFR 121.629(c)(2) calls for training and testing for flight crew and qualification for other affected personnel. Neither it, AC 120-60B nor the EASA bulletin sets a test format or pass mark for ground staff. Your operator program, authority or customer may require more, so ask them.
How often do de-icing staff need recurrent training?
The US rule and AC 120-60B point to annual recurrent training for operators with a ground de-icing program. SAE’s public abstract for AS6286E gives no interval, and the EASA bulletin cited here sets none. Check your competent authority and customer agreements, and add earlier checks after changes or occurrences.
Is SAE AS6286 mandatory?
SAE AS6286 is an industry standard, and its public abstract says it establishes minimum training and qualification requirements. Whether it binds you depends on your authority, operator program or customer contract. The EASA bulletin cited here highlights SAE AS6285 on processes, not AS6286, so ask your competent authority which standards it expects.
Can an online test assess de-icing competence?
It can assess the knowledge layer: holdover time, contamination, fluid types and communication. It cannot show that someone can carry out a task on an aircraft. Pair scenario items with an observed task scored on a pre-written checklist, and record both against the same person.
Does a regulator approve assessment software for de-icing?
Nothing in the sources checked says a regulator or SAE approves, certifies or accepts assessment software for de-icing. The FAA describes AC 120-60B as one acceptable method for getting a ground de-icing program approved, so the program is what gets reviewed. Choose software on whether it produces the evidence your program needs.
