Airworthiness Directive · Amendment 39-17805 · Fuselage main, bulkhead
M7 Aerospace LLC Airplanes
This AD applies to M7 Aerospace LLC Models SA226-AT, SA226-T, SA226-T(B), SA226-TC, SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), SA227-TT, SA26-AT, and SA26-T airplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for all M7 Aerospace LLC Models SA226-AT, SA226-T, SA226-T(B), SA226-TC, SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), SA227- TT, SA26-AT, and SA26-T airplanes. This AD was prompted by reports of airplanes with multiple fatigue cracks in the FS 69.31 front pressure bulkhead. This AD requires repetitively inspecting (visually) the FS 51.31 front pressure bulkhead on SA26 series airplanes and FS 69.31 front pressure bulkhead on SA226 and SA227 series airplanes for cracks, and repairing any cracked bulkhead; this AD also requires reporting certain inspection results to M7 Aerospace LLC. We are issuing this AD to correct the unsafe condition on these products.
Do a detailed visual inspection of the front pressure bulkhead using the compliance times in paragraphs (h)(1) and (h)(2) of this AD, including all subparagraphs, as applicable.
(1) For all SA26-AT and SA26-T airplanes: Do a detailed visual inspection of the F.S. 51.31 front pressure bulkhead following paragraphs A. through E. of the Accomplishment Instructions in M7 Aerospace LLC SA26 Series Service Bulletin 26-53-001 R1, revised November 6, 2013.
(2) For all SA226-AT, SA226-T, SA226 T(B), and SA226-TC airplanes: Do a detailed visual inspection of the F.S. 69.31 front pressure bulkhead following paragraphs A. through E. of the Accomplishment Instructions in M7 Aerospace LLC SA226 Series Service Bulletin 226-53-017 R1, revised November 6, 2013.
(3) For all SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), and SA227-TT airplanes: Do a detailed visual inspection of the F.S. 69.31 front pressure bulkhead following paragraphs A. through E. of the Accomplishment Instructions in M7 Aerospace LLC SA227 Series Service Bulletin 227-53-011 R1, revised November 6, 2013.
(4) For all SA227-CC and SA227-DC (C-26B) airplanes: Do a detailed visual inspection of the F.S. 69.31 front pressure bulkhead following paragraphs A. through E. of the Accomplishment Instructions in M7 Aerospace LLC SA227 Series Commuter Category Service Bulletin CC7-53-007 R1, revised November 6, 2013.
Note 1 to paragraph (g) of this AD: Operators who had the initial inspection and resulting repairs accomplished using procedures different from the M7 Aerospace LLC service information required by this AD action may apply for an alternative method of compliance (AMOC) following the instructions in paragraph (m) of this AD.
(1) Initially do the inspections for crack damage required by paragraph (g)(1), (g)(2), (g)(3), or (g)(4) of this AD, as applicable, using the compliance times specified below:
(i) For airplanes with 30,000 or more hours TIS, perform the inspection within the next 150 hours TIS after April 25, 2014(the effective date of this AD);
(ii) For airplanes with at least 25,000 but less than 30,000 hours TIS, perform the inspection within the next 300 hours TIS after April 25, 2014 (the effective date of this AD);
(iii) For airplanes with at least 20,000 but less than 25,000 hours TIS, perform the inspection within the next 450 hours TIS after April 25, 2014 (the effective date of this AD);
(iv) For airplanes with at least 11,000 but less than 20,000 hours TIS, perform the inspection within the next 600 hours TIS after April 25, 2014 (the effective date of this AD); or
(v) For airplanes with less than 11,000 hours TIS, perform the inspection before or upon accumulating 11,000 hours TIS or within the next 600 hours TIS after April 25, 2014 (the effective date of this AD), whichever occurs later.
(2) After the initial inspection specified in paragraph (h)(1) of this AD, to include all subparagraphs, repetitively thereafter do the inspections required in paragraph (g)(1), (g)(2), (g)(3), or (g)(4) of this AD, as applicable, at intervals not to exceed 1,000 hours TIS.
If any cracks or other damage is found during any inspection required by paragraph (g)(1), (g)(2), (g)(3), or (g)(4) of this AD, before further flight, report all damage to M7 Aerospace LLC using the contact information and reporting criteria specified in paragraph F. of the Accomplishment Instructions in the service information listed in paragraphs (i)(1) through (i)(4) of this AD, as applicable:
(1) M7 Aerospace LLC SA227 Series Commuter Category Service Bulletin CC7-53-007 R1, revised November 6, 2013.
(2) M7 Aerospace LLC SA227 Series Service Bulletin 227-53-011 R1, revised November 6, 2013.
(3) M7 Aerospace LLC SA26 Series Service Bulletin 26-53-001 R1, revised November 6, 2013.
(4) M7 Aerospace LLC SA226 Series Service Bulletin 226-53-017 R1, revised November 6, 2013.
If any damage is found during any inspection required by paragraph (g)(1), (g)(2), (g)(3), or (g)(4) of this AD, before further flight, repair the damage following paragraph G. of the Accomplishment Instructions in the service information listed in paragraphs (j)(1) through (j)(4) of this AD, as applicable. The repair scheme provided will be based on the damage reports submitted per paragraph (i) of this AD.
(1) M7 Aerospace LLC SA227 Series Commuter Category Service Bulletin CC7-53-007 R1, revised November 6, 2013.
(2) M7 Aerospace LLC SA227 Series Service Bulletin 227-53-011 R1, revised November 6, 2013.
(3) M7 Aerospace LLC SA26 Series Service Bulletin 26-53-001 R1, revised November 6, 2013.
(4) M7 Aerospace LLC SA226 Series Service Bulletin 226-53-017 R1, revised November 6, 2013.
This AD allows credit for the initial inspection and any resulting actions required in paragraphs (g)(1) through (g)(4), (i), and (j) of this AD, including all subparagraphs, if done before April 25, 2014 (the effective date of this AD), following the procedures specified in the Accomplishment Instructions of the applicable service information listed in paragraphs (k)(1) through (k)(4) of this AD:
(1) M7 Aerospace LLC SA227 Series Commuter Category Service Bulletin CC7-53-007, dated September 26, 2013.
(2) M7 Aerospace LLC SA227 Series Commuter Category Service Bulletin 227-53-011, dated September 26, 2013.
(3) M7 Aerospace LLC SA26 Series Service Bulletin 226-53-001, dated September 26, 2013.
(4) M7 Aerospace LLC SA226 Series Service Bulletin 226-53-017, dated September 26, 2013.
A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120-0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave. SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES-200.
