AD 89-20-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
Unsafe Condition
Rapid decompression of the airplane due to cracks in the fuselage skin at lap joints located at stringer 14L from body station 440 to 720, and at S-14R from body station 440 to 540.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct an internal detailed visual inspection for cracks of the fuselage skin at specified lap joints, followed by high or low frequency eddy current inspections within 500 landings or ten days after the AD's effective date, whichever is later. Repeat inspections at intervals of 2,000 landings (HFEC) or 1,000 landings (LFEC). Repair detected cracks prior to further flight using specified Boeing drawings. Modifications per Boeing Drawing 65C35402 terminate repetitive inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 15 days after receipt of AD T89-14-51, dated June 30, 1989, for the initial inspection. The subsequent inspection must be done within 500 landings after the initial inspection or ten days after the AD's effective date (October 6, 1989), whichever is later. Repeat inspections must be conducted within 2,000 landings (HFEC) or 1,000 landings (LFEC) after the previous inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 727 series airplanes, line numbers 001 through 047, 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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