Airworthiness Directives; McDonnell Douglas Model DC-9-31 and DC-9-32 Airplanes
airworthiness · Rule · Final rule. · Published 2004-03-03 · Effective 2004-04-07 · 69 FR 9932
Document
Document number
04-4561
Federal Register citation
69 FR 9932
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
McDonnell Douglas Model DC-9-31 and DC-9-32
Publication date
2004-03-03
Effective date
2004-04-07
FAA docket
Docket No. 2003-NM-32-AD
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-31 and DC-9-32 airplanes, that requires replacement of certain power relays, and subsequent repetitive cleaning, inspecting, repairing, and testing of certain replaced power relays. This action is necessary to prevent internal arcing of the left and right generator power relays, auxiliary power relays, and external power relays, and consequent smoke and/or fire in the cockpit and cabin. This action is intended to address the identified unsafe condition.