AD 81-15-51 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sabreliner Corporation | NA-265-60 | Airworthiness Directives; ROCKWELL Models NA-265-60 and NA-265-80 Airplanes |
| aircraft | Sabreliner Corporation | NA-265-80 | Airworthiness Directives; ROCKWELL Models NA-265-60 and NA-265-80 Airplanes |
Unsafe Condition
Improper flap motion caused by a failure in the flap actuation system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework the power drive unit and flap jackscrew actuators per Service Bulletin 81-5. Replace any drive shaft (part No. 57400-1640) with an extra hole. Repetitively remove and replace the power drive unit and flap jackscrew actuators every 200 landings.
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Compliance Time
Within the next 20 landings following the effective date of this AD, or prior to the accumulation of 200 landings after incorporation of STC SA687NW or STC SA847NW, whichever comes later.
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Affected Aircraft
Rockwell NA-265-60 airplanes modified with STC SA687NW and equipped with Lear Siegler Flap Actuation System; Rockwell NA-265-80 airplanes modified with STC SA847NW.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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