AD Amdt-39-10500

final rule
Data completeness: 70%

Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes, and Model MD-88 Airplanes

AD Number
Amdt-39-10500
Status
final_rule
Effective Date
Product Category
engine
Docket
Docket No. 96-NM-199-AD
FR Citation
63 FR 23379

Applicability

TypeManufacturerModelDetails
aircraft McDonnell Douglas DC-9 Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes, and Model MD-88 Airplanes

Unsafe Condition

Uncontained failures of engine starters during flight and maintenance resulting from excessive pressure on the engine starter associated with the installation of non-regulating shutoff valves on the starter.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Modify certain non-regulating shutoff valves on the engine starter or install a pressure relief valve in the pneumatic supply line to the starter air shutoff valve on engines 1 and 2.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

McDonnell Douglas Model DC-9, DC-9-80, C-9 (military) series, and Model MD-88 airplanes with non-regulating shutoff valves on the engine starter.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for McDonnell Douglas DC-9

Related Airworthiness Directives

2010-25-04

final rule

Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes, Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87) Airplanes, and Model MD-88 and MD-90-30 Airplanes

Unsafe Condition: could result in a fire or an explosion and consequent loss of the airplane.

Effective: Jan 11, 2011 Category: aircraft

2010-23-10 Recurring

final rule

Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-14, DC-9-15, and DC-9-15F Airplanes; and Model DC-9-20, DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

Unsafe Condition: which could cause a possible fuel leak, damage to the wing skin, and structural failure of the upper cap, and result in reduced structural integrity of the airplane.

Effective: Dec 14, 2010 Category: aircraft

2009-15-16

final rule

Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-10 Series Airplanes, DC-9-30 Series Airplanes, DC-9-81 (MD-81) Airplanes, DC-9-82 (MD-82) Airplanes, DC-9-83 (MD-83) Airplanes, DC-9-87 (MD-87) Airplanes, MD-88 Airplanes, and MD-90-30 Airplanes

Unsafe Condition: which could jeopardize flight safety.

Effective: Jul 6, 2010 Category: aircraft

2010-10-20

final rule

Airworthiness Directives; McDonnell Douglas Corporation Model DC-9-30, DC-9-40, and DC-9-50 Series Airplanes

Unsafe Condition: could result in a fire or explosion.

Effective: Jun 21, 2010 Category: aircraft

View all McDonnell Douglas ADs →