AD 2009-25-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat | Various | Airworthiness Directives; ZLT Zeppelin Luftschifftechnik GmbH & Co KG Model LZ N07-100 Airships |
Unsafe Condition
The bevel gear in the RH propeller gearbox has cracked near the hub area due to manufacturing deviations, including deviations in heat treatment, wall thickness, and score marks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the bevel gears of the propeller gearbox in accordance with ZLT Zeppelin Luftschifftechnik GmbH & Co KG Service Bulletin S07 830 0001, Issue B-00, dated June 29, 2009. Limit the service-life of the affected bevel gears to 1,000 flight hours for non-refurbished PGBs and 1,600 flight hours for refurbished PGBs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the applicable total hours time-in-service (TIS) as defined in the appendix of the referenced service bulletin.
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Affected Aircraft
ZLT Zeppelin Luftschifftechnik GmbH & Co KG Model LZ N07-100 airships, serial numbers 002, 003, and 004, equipped with specific propeller gear boxes (Part Nos. 07 722 0001-200, 07 722 0002-200, and 07 722 0003-200 with listed serial numbers).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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