AD 94-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-100B Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-100B SUD Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-200B Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-200C Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-200F Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-300 Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747 series airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747 series airplanes |
Unsafe Condition
Complete migration of the forward lower engine mount bolt out of the joint could result in the separation of the engine from the strut.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 60 days after May 31, 1994, visually inspect the forward lower engine mount bolts for migration. Depending on migration status and equipment, replace nuts, bolts, or bushings as specified, perform torque checks, and establish inspection intervals (2,100 to 6,000 flight hours) based on nut part numbers and presence of a steel retention bracket. Alternative methods may be approved by the Seattle ACO.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 60 days after the effective date of this AD, and prior to further flight as specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747 series airplanes equipped with Pratt & Whitney JT9D-3 and -7 series engines (excluding -70 series engines), certificated in any category.
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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