AD 86-19-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; MCDONNELL DOUGLAS: DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; MCDONNELL DOUGLAS: DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; MCDONNELL DOUGLAS: DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; MCDONNELL DOUGLAS: DC-9-80 Series Airplanes |
Unsafe Condition
Elevator jamming due to missing retaining nut, cotter pin, or washer on the left and right elevator hydraulic boost cylinder attach rod ends could result in loss of adequate aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 6 calendar days after the effective date, open access doors 3507 and 3608, visually inspect the rod ends for missing components, and install new washer, nut, and cotter pin if missing. Torque nut to 250-270 inch-pounds and align slot with cotter pin hole, ensuring the PLI washer's ring rotates freely after installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 6 calendar days after the effective date of this AD
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Affected Aircraft
MCDONNELL DOUGLAS DC-9-80 series airplanes with fuselage numbers 1243 through 1259, 1261 through 1286, 1289 through 1291, 1293 through 1299, 1301 through 1304, and 1306
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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