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AD/B737/321 - Fuel Systems Airworthiness Limitations & Motor Operated valves
Boeing 737 Series AeroplanesBoeing 737 Series Aeroplanes
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Boeing 737 Series Aeroplanes
| AD/B737/321 | Fuel Systems Airworthiness Limitations & Motor Operated valves | 6/2008 |
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| Applicability: | Model 737-600, -700, -700C, -800 and -900 series aeroplanes, as identified in Boeing Alert Service Bulletin (ASB) 737-28A1207, dated 15 February 2007. |
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| Requirement: | 1. Inspect the following three motor-operated valves (MOVs) to determine whether an MOV with the affected part number, identified in the Accomplishment Instructions of ASB 737-28A1207, is installed: |
| a. Left engine fuel shutoff (spar) valve,b. Right engine fuel shutoff (spar) valve, andc. Fuel crossfeed valve. | |
| A review of aeroplane’s maintenance records is acceptable in lieu of this inspection if the part number of the part can be conclusively determined from that review. | |
| 2. Accomplish all applicable related investigative and corrective actions in accordance with the Accomplishment Instructions of ASB 737-28A1207. | |
| 3. Revise the airworthiness limitations (AWL) section of the Instructions for Continued Airworthiness for the aeroplane by incorporating the information specified in Section F, ''AIRWORTHINESS LIMITATIONS–FUEL SYSTEM AWLs,'' of Boeing 737-600/700/700C/700IGW/800/900 MPD Document D626A001-CMR, Section 9, Revision November 2006 R1, into the Maintenance Planning Data (MPD) to incorporate AWL No 28-AWL-21 No. 28-AWL-22 and No. 28-AWL-24. | |
| Accomplishing the revision in accordance with a later revision of the MPD document is an acceptable method of compliance if the revision is approved by the Manager, Seattle Aircraft Certification Office (ACO), United States Federal Aviation Administration (FAA). | |
| Later revisions of the ASB 737-28A1207, approved by the FAA as an Alternate Method of Compliance (AMOC) to FAA AD 2008-06-03, are considered acceptable for compliance with the equivalent Requirements of this Directive. |
| Note: FAA AD 2008-06-03 Amdt 39-15415 refers. | |
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| Compliance: | For Requirement 1 - Within 60 months after the effective date of this Directive. |