AD 80-09-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING 737-100 and -200 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING 737-100 and -200 Series Airplanes |
Unsafe Condition
The horizontal stabilizer trim actuator (P/N 10-61326-4 or -5) may have insufficient stall torque below 350 inch pounds, which could reduce horizontal stabilizer trim capability.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within six months after the effective date (May 6, 1980), accomplish either: A) Test the actuator stall torque per Boeing SB 737-27-1101, replace those with less than 350 inch pounds torque, and conduct repetitive tests per Figure 2 intervals; B) Replace P/N 10-61326-4/-5 with P/N 10-61326-6 per SB 737-27-1101; or C) Perform an equivalent inspection/installation approved by the FAA Northwest Region.
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Compliance Time
within the next six (6) months after the effective date of this AD
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Affected Aircraft
Boeing 737-100 and -200 series airplanes certificated at takeoff weights over 97,800 pounds with horizontal stabilizer trim actuator P/N 10-61326-4 or -5. Includes line numbers 482 and on if those actuators were exchanged for P/N 10-61326-6.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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