AD 98-21-24
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Division | JT8D-209 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-217 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-217A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-217C | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-219 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-1 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-11 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-15 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-15A | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
| engine | Pratt & Whitney Division | JT8D-17 | Airworthiness Directives; Pratt & Whitney JT8D Series Turbofan Engines |
Unsafe Condition
Improper fixturing during electrolytic cleaning of compressor disks at a certified repair station can result in arc burn damage to the disks, leading to cracking in tie rod holes, shielding holes, or pressure balance holes, which could cause compressor disk fracture and uncontained release of engine fragments, inflight engine shutdown, and airframe damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove, visually inspect, and perform eddy current inspection of affected compressor disks. Repair or replace disks with arc burn damage. Operators may use alternate methods or sources under paragraph (e) of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3,000 cycles in service after the effective date (November 16, 1998) or at the next shop visit, whichever occurs first, not to exceed 10 years from the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pratt & Whitney JT8D series turbofan engines with compressor disks identified by part number and serial number in Table 1 of the AD, installed on various aircraft models including Boeing 7
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.