Airworthiness directives › 2018-20-13
AD 2018-20-13 Airworthiness Directives; The Boeing Company Airplanes
Models named: 737, 737-100, -200, -200C, -300, -400, -500 series, 757-200, -200PF, -200CB. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all The Boeing Company airplanes, certificated in any category, identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD. (1) Model 737 airplanes, excluding Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. (2) Model 757-200, -200PF, -200CB, and -300 series airplanes. (3) Model 767-200, -300, -300F, and -400ER series airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes: Within 8 years after the effective date of this AD, do an inspection to determine the part numbers of the MOV actuators of the fuel shutoff valves for the left and right engines, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 737-28-1314, dated November 17, 2014. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the MOV actuator at each location can be conclusively determined from that review. (2) For airplanes identified in paragraphs (c)(2) and (c)(3) of this AD: Within 8 years after the effective date of this AD, do an inspection to determine the part numbers of the MOV actuators of the fuel shutoff valves for the left and right engines, and of the APU fuel shutoff valve, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-28-0138, Revision 1, dated June 19, 2017 (“SB 757-28-0138 R1”); or Boeing Service Bulletin 767-28-0115, Revision 1, dated June 2, 2016 (“SB 767-28-0115 R1”); as applicable. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the MOV actuator at each location can be conclusively determined from that review.
Unsafe condition
This AD was prompted by reports of latently failed motor-operated valve (MOV) actuators of the fuel shutoff valves. We are issuing this AD to prevent a latent failure of the actuator for the engine or auxiliary power unit (APU) fuel shutoff valves, which could result in the inability to shut off fuel to the engine or the APU, and, in case of certain engine or APU fires, could result in structural failure.
Affected ADs
This AD affects AD 2015-21-09, Amendment 39-18302 (80 FR 65121, October 26, 2015) (“AD 2015-21-09”); AD 2015-19-04, Amendment 39-18267, (80 FR 55505, September 16, 2015) (“AD 2015-19-04”); and AD 2015-21-10, Amendment 39-18303 (80 FR 65130, October 26, 2015) (“AD 2015-21-10”).
Read the original on the Federal Register →
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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