Airworthiness directives › 2022-07-03
AD 2022-07-03 Airworthiness Directives; Bell Textron Inc., Helicopters
Models named: 412, 412EP, 412CF. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bell Textron Inc., Model 412, 412EP, and 412CF helicopters, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 50 hours time-in-service (TIS) after the effective date of this AD: (i) For helicopters with a Strake and FF system part number (P/N) 412-705-040-101 installed since initial delivery from the manufacturer, add a permanent penalty of 5,000 hours TIS to the total hours TIS indicated on the component history card or equivalent record for the collective lever P/N 412-010-408-101. Note 1 to paragraph (g)(1)(i): Bell Helicopter service information identifies helicopters with serial numbers 36570, 36579, 36587, and 36593 through 36602 inclusive, as being originally delivered with a Strake and FF system installed and needing the flight hour (hours TIS) penalty on collective lever P/N 412-010-408-101 applied. (ii) For helicopters with Strake and FF system P/N 412-705-040-101 installed after delivery from the manufacturer, calculate the TIS penalty for collective lever P/N 412-010-408-101 by accomplishing the following: (A) Verify the component history card or equivalent record of the collective lever and note the total hours TIS. (B) Determine the remaining hours TIS by subtracting the total hours TIS of the collective lever from its life limit of 10,000 total hours TIS. (C) Divide the remaining time by 2 and add that number to the existing total hours TIS. This is the new total TIS after being penalized. (D) Enter the new total TIS after being penalized from paragraph (g)(1)(ii)(C) of this AD to the component history record or equivalent record for the collective lever. (2) Before further flight, remove from service any collective lever P/N 412-010-408-101 that has reached or exceeded its life limit of 10,000 total hours TIS. Thereafter, remove from service each collective lever P/N 412-010-408-101 on or before reaching its life limit of 10,000 total hours TIS. (3) As of the effective date of this AD, do not install a new (zero total hours TIS) collective lever P/N 412-010-408-101 on any helicopter with Strake and FF system P/N 412-705-040-101 installed unless a penalty of 5,000 hours TIS has been added to the total hours TIS on its component history card or equivalent record. (4) As of the effective date of this AD, do not install a used collective lever P/N 412-010-408-101 on any helicopter with Strake and FF system P/N 412-705-040-101 installed unless a penalty is calculated by accomplishing the actions required in paragraph (g)(1)(ii) of this AD.
Unsafe condition
This AD was prompted by evaluation results showing flight loads that impact the collective lever fatigue life on helicopters with a BLR Aerospace Strake and FastFin (Strake and FF) system installed. The FAA is issuing this AD to prevent fatigue damage and cracking, which could result in failure of the collective lever and subsequent loss of control of the helicopter.
Affected ADs
None.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1