# Incident 20210129019039I: Boeing 767-338, Ontario, CA, January 29, 2021

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: January 29, 2021, 10:49 local time
- Place: Ontario, CA
- Damage: Minor damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: Foreign air carrier (Part 129)
- Operator: OTZF
- Location: 34.0560° N, 117.6014° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=34.0560&lon=-117.6014&mi=10
- Aircraft: N363CM, registered now (https://openairdocs.org/aircraft/N363CM) (OpenAirDocs)
- Registry model: Boeing 767-338 (registry code 1385151, https://openairdocs.org/model/boeing-767-338) (OpenAirDocs)
- Reported make and model: BOEING 767-338
- Reported engine: GE CF6-80C2
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- NTSB investigation: [NTSB ENG21LA013](https://openairdocs.org/ntsb/ENG21LA013) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20210129019039I

## Narrative

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

ON JANUARY 29, 2021, ABOUT 10:49 PACIFIC STANDARD TIME, A BOEING 767-338, REGISTRATION NUMBER, N363CM^PRIVACY DATA OMITTED^, AND POWERED BY

TWO GENERAL ELECTRIC (GE) CF6-80C2-B6 TURBOFAN ENGINES, EXPERIENCED A RIGHT (NO. 2) ENGINE FIRE DURING CLIMB FROM LOS ANGELES INTERNATIONAL AIRPORT (LAX), LOS ANGLES, CALIFORNIA. A DIVERSION TO THE ONTARIO INTERNATIONAL AIRPORT (ONT), ONTARIO, CALIFORNIA FOR AN UNEVENTFUL SINGLE ENGINE LANDING WAS MADE. THE INCIDENT FLIGHT WAS A 14 CODE OF FEDERAL REGULATIONS (CFR) PART 129 CARGO FLIGHT FROM LAX TO THE MEXICO

CITY INTERNATIONAL AIRPORT (MEX), MEXICO CITY, MEXICO.

A POST LANDING INSPECTION REVEALED EXTENSIVE DAMAGE TO THE #2 ENGINE, AND MINOR DAMAGE TO THE AIFRAME TO INCLUDE PUNCTURES TO THE RIGHT AILERON AND REAR CARGO DOOR.

BASED ON DFDR DATA, THE ENGINE OPERATED IN A HIGH UNBALANCED CONDITION (>5 CU'S) FOR APPROXIMATELY 4 MINUTES, THEN CONTINUED WINDMILLING FOR AT LEAST 40 MINUTES NEAR 2.5 CU'S.

THE MOST LIKELY FAILURE SCENARIO AS OF THE DATE OF THIS REPORT IS AS FOLLOWS:

1. LOW PRESSURE TURBINE (LPT) STAGE 5 NOZZLE LIBERATED TWO AIRFOILS.

2. THIS FAILURE LED TO SECONDARY DAMAGE TO LPT STAGE 4 & 5.

3. ROTOR IMBALANCE OCCURS THAT IS CALCULATED AT 50 CU'S, OVER 10 TIMES WHAT THE FDR CAN RECORD AND THE EQUIVALENT OF A FAN BLADE OUT (FBO) EVENT.

4. LPT STAGES 1, 2 AND 3 SUSTAIN SEVERE RUB DAMAGE FROM CONTACT AND AIRFOILS CRACK MIDSPAN.

5. ACCESSORY GEARBOX TRANSVERSE LINKAGE BREAKS, CAUSING OIL LINE TO FRACTURE AND AN OIL-FED FIRE TO START.

THIS EVENT IS CONSIDERED A CONTAINED ENGINE FAILURE, AND ALL ENGINE CONTROLS AND FIRE SUPRESSION SYSTEMS WORKED AS EXPECTED.

THE ENGINE HAD LOGGED 54,187 HOURS SINCE NEW (20,656 CYCLES), BUT ONLY 1,649 HOURS (669 CYCLES) SINCE LAST OVERHAUL.

## 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 ENG21LA013](https://openairdocs.org/ntsb/ENG21LA013), Jan 29, 2021: Boeing 767-338 (N363CM), Ontario, CA, incident, minor damage. Probable cause: The fatigue fracture and liberation of two airfoils from a low pressure turbine stage 5 nozzle segment that impacted and damaged the downstream low pressure stage 5 blades creating an initial…

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.

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