AD 92-03-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-200C Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-600 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-700 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
| aircraft | The Boeing Company | 737-800 Series | Airworthiness Directives; BOEING Model 737 Series Airplanes |
Unsafe Condition
Uncontained APU tailpipe fire due to clogged shroud and fuel drains.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and clean APU shroud, plenum, and combustor drain lines every 500 flight hours or after maintenance affecting the drain system. Revise AFM Limitations section to include instructions for monitoring APU ground starts and handling unsuccessful starts. Modify APU drain assembly within 36 months of AD effective date to replace repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to 150 flight hours after April 25, 1989; within 10 days after March 12, 1990; and within 36 months after the AD effective date (March 16, 1992).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 737 series airplanes, line number 0001 through 2060 equipped with Garrett GTCP 85-129 series APUs.
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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