AD Amdt-39-9525

final rule
Data completeness: 70%

Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes

AD Number
Amdt-39-9525
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 95-NM-118-AD
FR Citation
61 FR 8208

Applicability

TypeManufacturerModelDetails
aircraft McDonnell Douglas DC-9-80 Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes

Unsafe Condition

Incorrectly manufactured motor shafts in horizontal stabilizer primary trim motors could fail prematurely, causing primary trim motor failure.

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

Required Actions

Inspect and replace certain suspect horizontal stabilizer primary trim motors. Expand applicability to include additional affected airplanes.

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-9-80 series airplanes, including additional affected airplanes as per the amendment.

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-9-80

Related Airworthiness Directives

2001-09-18 Recurring

final rule

Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

Unsafe Condition: could result in failure of the pistons and subsequent damage to the airplane structure or injury to airplane occupants.

Effective: Jun 14, 2001 Category: aircraft

2001-06-16

final rule

Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

Unsafe Condition: could result in ingestion of ice into one or both engines and consequent loss of thrust from one or both engines.

Effective: May 7, 2001 Category: aircraft

2000-11-01

final rule

Airworthiness Directives; McDonnell Douglas Model DC-9-80 and MD-90-30 Series Airplanes, and Model MD-88 Airplanes

Unsafe Condition: This amendment adopts a new airworthiness directive (AD), applicable to certain McDonnell Douglas Model DC-9-80 and MD-90-30 series airplanes, and Model MD-88 airplanes, that requires a determinati...

Effective: Jun 30, 2000 Category: aircraft

Amdt-39-11428

final rule

Airworthiness Directives; McDonnell Douglas Model DC-9-80 Series Airplanes and Model MD-88 Airplanes

Unsafe Condition: could result in fatigue cracking and reduced structural integrity of the airplane.

Effective: Dec 27, 1999 Category: aircraft

View all McDonnell Douglas ADs →