AD 56-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Russell Manufacturing Company | Safety Belts | Airworthiness Directives; RUSSELL: Applies to Safety Belts Equipped With Russell Manufacturing Co.'s 2 Inch Rusco Tog-L-Lok Safety Belt Buckle |
Unsafe Condition
Safety belt assemblies RM-3 and RM-4 manufactured between July 1, 1954, and August 1, 1956, have slipped and unlocked under relatively low tension loads, making them unairworthy.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Re-work or replace belt assemblies with those conforming to TSO-C22b standards. Apply a maximum tensile load of 100 pounds to check airworthiness; rework or replacement is only required if the assembly slips or unlocks under this load.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as soon as possible but not later than December 30, 1956.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Russell Manufacturing Company Safety Belts models RM-3 and RM-4 manufactured between July 1, 1954, and August 1, 1956, equipped with Rusco Tog-L-Lok buckles.
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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