TrackAD

Airworthiness directives › 2021-04-19

AD 2021-04-19 Airworthiness Directives; Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) Helicopters

2021-04-13
2021-03-09
—
—
Airframe
—

Models named: 205B. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

This AD applies to Bell Textron Inc. (Bell) Model 205B helicopters, certificated in any category, with a tail rotor (T/R) blade part number (P/N) 212-010-750-009, 212-010-750-105, 212-010-750-109, 212-010-750-111, 212-010-750-113, 212-010-750-117, 212-010-750-133, 212-010-750-135, 212-010-750-117FM, or 212-010-750-135FM installed.

Compliance

Comply with this AD within the compliance times specified, unless already done.

Required actions

(1) Before further flight: (i) Determine the total hours time-in-service (TIS) of each T/R blade and remove from service each T/R blade that has accumulated 2,500 or more hours TIS. For each T/R blade that has accumulated less than 2,500 hours TIS, do the following: (ii) Re-identify the P/N on the T/R blade data plate by vibro-etching to change the last three digits of the existing P/N as follows: (A) For T/R blade P/N 212-010-750-009, re-identify the P/N as 212-010-750-111. (B) For T/R blade P/N 212-010-750-105, re-identify the P/N as 212-010-750-109. (C) For T/R blade P/N 212-010-750-113, re-identify the P/N as 212-010-750-117FM. (D) For T/R blade P/N 212-010-750-133, re-identify the P/N as 212-010-750-135FM. (iii) Create a component history card or equivalent record to reflect the change in P/N for each T/R blade, and establish a life limit of 2,500 hours TIS. (iv) Revise the Airworthiness Limitations Section of the existing maintenance manual or the Instructions for Continued Airworthiness for your helicopter to establish a life limit of 2,500 hours TIS for each T/R blade P/N 212-010-750-109, P/N 212-010-750-111, P/N 212-010-750-117, P/N 212-010-750-135, P/N 212-010-750-117FM, and P/N 212-010-750-135FM. (2) Thereafter, except as provided in paragraph (i), no alternative life limits may be approved for T/R blade P/N 212-010-750-009, P/N 212-010-750-105, P/N 212-010-750-113, or P/N 212-010-750-133. (3) After the effective date of this AD, do not install a T/R blade P/N 212-010-750-009, P/N 212-010-750-105, P/N 212-010-750-113, or P/N 212-010-750-133 on any Model 205B helicopter unless the part number has been changed and the life limit reduced in accordance with this AD. (4) After the effective date of this AD do not install a T/R blade P/N 212-010-750-109, P/N 212-010-750-111, P/N 212-010-750-117, P/N 212-010-750-135, P/N 212-010-750-117FM, or P/N 212-010-750-135FM, on any Model 205B helicopter unless the life limit has been reduced in accordance with this AD.

Unsafe condition

This AD was prompted by flight testing and fatigue analysis that indicates that these part-numbered T/R blades sustain greater loads when used on Bell Model 205B helicopters compared to their use on other model helicopters. The FAA is issuing this AD to prevent a T/R blade from remaining in service beyond its fatigue life, resulting in failure of the T/R blade and subsequent loss 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.

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