Boeing 737 Series Aeroplanes
Boeing 737 Series Aeroplanes
Boeing 737 Series Aeroplanes
| AD/B737/256 | Hydraulic System "B" Abex Pump Motor | 13/2005 |
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| Applicability: | Boeing Models 737-100, and 737-200 series aeroplanes, equipped with hydraulic system "B" Abex P/N 57186 pump motor. |
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| Requirement: | 1. Install the ground fault protection systems in the hydraulic system "B" Abex pump motor electric power circuits in accordance with Boeing Service Bulletin 737-29-1029 Revision 2, dated 8 October 1976 or later FAA-approved revisions; or2. Install the hydraulic "B" system motor driven pumps, either new or upgraded, in accordance with Boeing Service Bulletin 737-29-1036, dated 30 April 1980, or later FAA-approved revisions.Note: FAA AD 87-02-05R1 Amdt 39-5675 refers. |
| Compliance: | Within 30 days after the effective date of this AD, unless previously accomplished. |
| This Airworthiness Directive becomes effective on 22 December 2005. | |
| Background: | This AD is intended to prevent a hydraulic system "B" Abex P/N 57186 pump motor internal wiring fault from burning a hole in the pump motor case and providing an ignition source to any flammable liquids. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
10 November 2005