# Incident 19990625016179I: Doug DC982, San Diego, CA, June 25, 1999

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: June 25, 1999, 14:40 local time
- Place: San Diego, CA
- Airport: San Diego International-Lindbergh Fld
- Phase of flight: To Init Climb(1st Pwr Reduct)
- Operating rules: Air carrier (Part 121)
- Operator: AALA
- Location: 32.9308° N, 117.0102° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=32.9308&lon=-117.0102&mi=10
- Aircraft: N450AA, a cancelled registration (https://openairdocs.org/deregistered/N450AA-2011-07-26) (OpenAirDocs)
- Registry model: Mcdonnell Douglas DC-9-82(MD-82) (registry code 3022082, https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82) (OpenAirDocs)
- Registry engine: Pratt & Whitney JT8D series (registry code 52053, https://openairdocs.org/engine/pratt-whitney-jt8d-series) (OpenAirDocs)
- Reported make and model: DOUG DC982
- Reported engine: PWA JT8D217C
- People aboard: 141
- Fatal injuries: 0
- Pilot flight hours: 8,000 total
- NTSB investigation: [NTSB LAX99IA230](https://openairdocs.org/ntsb/LAX99IA230) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990625016179I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE CREW HEARD A POP AFTER THE NOSE WHEEL LIFTED UP DURING ROTATION ON TAKEOFF AND A LOSS OF POWER OCCURRED ON THE RIGHT ENGINE. AN EMERGENCY WAS DECLARED AND AN UNEVENTFUL LANDING WAS COMPLETED. ALL OF THE THIRD AND FOURTH STAGE TURBINE BLADES FRACTURED AT THE ROOT AND NO FATIGUE MARKS WERE NOTED. THE SECOND STAGE TURBINE BLADES FRACTURED AT 1/2 TO 2/3 SPAN. ALL LOW-PRESSURE TURBINE NOZZLE GUIDE VANES EXHIBITED SIGNIFICANT LEADING EDGE RUB AND HAD MESHED WITH ADJACENT TURBINE BLADE TRAILING EDGES. THE LOW-PRESSURE COMPRESSOR DRIVE TURBINE SHAFT FRACTURED APPROXIMATELY 25 INCHES AFT OF THE LOW-PRESSURE COMPRESSOR. THIS FRACTURE WAS TWISTED AND CONTAINED A LARGE AREA OF DISPLACED AND GALLED METAL; COKE/CARBON WAS OBSERVED UNDER THE GALLED METAL. THE NUMBER 3 BEARING WAS DAMAGED; ALL BALLS WERE WORN WITH FLAT SPOTS UP TO 1/2 THE BALL CIRCUMFERENCE. SPALLING WAS EVIDENT ON THE INNER AND OUTER RACE, BUT NO RACE SPINNING WAS NOTED. THE CAGE WAS INTACT, BUT WORN. NO EVIDENCE OF OIL STARVATION OR OVERHEATING WAS EVIDENT. A FLOW CHECK OF THE OIL SUPPLY SYSTEM TO THE NUMBER 3 BEARING WAS COMPLETED WITH NO BLOCKAGE OR FLOW ANOMALIES DETECTED. AN INSPECTION BY AN INDEPENDENT LABORATORY COULD COULD NOT DETERMINE A CAUSE FOR THE BEARING FAILURE. THE NUMBER 3 BEARING HAD ACCUMULATED 12,487 HOURS SINCE NEW.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX99IA230](https://openairdocs.org/ntsb/LAX99IA230), Jun 25, 1999: Boeing DC-9-82 (N450AA), San Diego, CA, incident, no damage. Probable cause: failure of the number three bearing. The resulting oil leak from the bearing led to coke/carbon buildup, which resulted in chafing of the turbine's low-pressure compressor drive shaft on the rear…

## Other reports on N450AA (1)

Matched to the same aircraft by N-number and date.

- [Incident 19991007031089I](https://openairdocs.org/incident/19991007031089I), Oct 7, 1999: Doug DC982 (N450AA), St Louis, MO. (-23) On flight from ord to stl during climbout, tail compartment temp hight light came on. Crew initiated emergency checklist. Light stayed on. Crew initiated…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.