Airworthiness Directive · Amendment 39-16670 · Flight controls
Pacific Aerospace Limited Model 750XL Airplanes
This AD applies to Pacific Aerospace Limited Model 750XL airplanes, all serial numbers through 111, certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions:
(1) Inspect the quadrant welds in the LH rudder pedal assembly, part number (P/N) 11-45711-1, and the RH rudder pedal assembly, P/N 11-45713-1, for cracks at the following times following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/050, Issue 1, dated December 15, 2010:
(i) Initially before further flight after the effective date of this AD.
(ii) Repetitively thereafter at intervals not to exceed 300 hours time-in-service (TIS) until the modification repair scheme required in paragraph (f)(2) of this AD is incorporated.
(2) Incorporate modification repair scheme Pacific Aerospace Drawing Number 11-03221/22, dated December 3, 2010, as specified in Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/050, Issue 1, dated December 15, 2010, at the following time:
(i) Before further flight after any inspection required in paragraphs (f)(1)(i) or (f)(1)(ii) of this AD if any cracks are found.
(ii) Within the next 1,200 hours TIS after the effective date of this AD or within the next 12 months after the effective date of this AD, whichever occurs first, if no cracks are found during any inspection required in paragraphs (f)(1)(i) or (f)(1)(ii) of this AD. Incorporating modification repair scheme Pacific Aerospace Drawing Number 11-03221/22, dated December 3, 2010, terminates the repetitive inspections required in paragraph (f)(1)(ii) of this AD.
(3) You may incorporate modification repair scheme Pacific Aerospace Drawing Number 11-03221/22, dated December 3, 2010, at any time after the initial inspection required in paragraph (f)(1)(i) of this AD but no later than the compliance time specified in paragraph (f)(2)(ii) of this AD as long as no cracks were found. As required in paragraph (f)(2)(i) of this AD, the modification repair scheme must be incorporated before further flight if cracks are found.
Note: This AD differs from the MCAI and/or service information as follows: The MCAI Civil Aviation Authority (CAA) AD DCA/750XL/14, dated March 31, 2011, and the applicable service bulletin specifies repair of the rudder pedal assembly if cracks are found exceeding certain limits and allows continued flight for a specified time if cracks are found in the rudder pedal assembly that do not exceed certain limits. This AD does not allow continued flight if any crack is found. The FAA policy is to disallow airplane operation when known cracks exist in primary structure, unless the ability to sustain ultimate load with these cracks is proven. The rudder pedal assembly is considered primary structure, and the FAA has not received any analysis to prove that ultimate load can be sustained with cracks in this area.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
