AD 82-26-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200B Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200C Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-200F Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-300 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400 Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | BOEING Model 747 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | BOEING Model 747 Series Airplanes |
Unsafe Condition
Failure of the dual channel autopilot with M & L Unit (Boeing Part Number 60B00013-452, -453, -454, and on) could result in no-flare automatic landings with excessive sink rates.
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Required Actions
Incorporate specified limitations in the Airplane Flight Manual, install a placard on the autopilot flight director mode select panel, or install the Boeing Service Bulletin 747-22-2127 modification and placard. Accomplishment of Boeing Service Bulletin 747-22-2130 allows removal of placards and limitations.
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Compliance Time
within 180 days after the effective date of this AD
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Affected Aircraft
Boeing Model 747 Series airplanes equipped with a dual channel autopilot with Monitor and Logic (M & L) Unit, Boeing Part Number 60B00013-452, -453, -454, and on, listed in Boeing Service Bulletin 747-22-2130.
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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