- Date
- May 13, 1992, 15:52 local (22:52 UTC)
- Place
- Los Angeles, CA
- Injuries
- 3 minor, 81 uninjured
- Damage
- Minor damage
- Phase of flight
- Takeoff
- Aircraft
- N604UABoeing 767-222
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 14, 1993
- Report
- Approved by Office Director
- FAA report
- 19920513014769I
- Case key
- 27458
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
A rupture in the airplane's air condition/heat/pressurization/apu duct, along its welded seam. Contributing to the incident was the manufacturers' failure to issue a service bulletin applicalbe to all APU ducts in the systems.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The pneumatic distribution supply duct ruptured as the airplane began its takeoff roll with the first officer at the controls. The captain felt a slight change in cabin pressure and observed an advisory message on the electronic information crew alarm system (eicas) that cautioned of a leak in the pneumatic duct system. The first flight attendant advised the flight crew that there was smoke, dust and high temperatures in the cabin. The captain assumed control of the airplane, aborted the takeoff and turned off the runway at a midfield taxiway. After the airplane exited the runway the captain dispatched the first officer to the cabin to survey the situation. The first officer confirmed the flight attendant's report and advised that the passengers were coughing continuously. The captain elected to evacuate all personnel via the emergency egress slides. The examination disclosed the APU supply duct ruptured along the welded seam at fuselage station (fs) 1219.
Aircraft
- Registration
- N604UA
- Reported as
- Boeing 767-222
- Category
- Airplane
- Serial number
- 21865
- Airframe hours
- 30,969
- Engine
- P&W 2037, 38,200 lbs thrust, turbo fan
- Damage
- Minor damage
- Flight
- Part 121
- Operator
- United Airlines
- Registered owner
- United Airlines
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · August 28, 1991 · 2,608 hours before
- Departed
- LAX
- Destination
- EWR · Newark, NJ
- Flight plan
- IFR
- Airport
- LAX · Los Angeles Int'L Arpt, runway 25, 1,209 × 150 ft, concrete
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 52
- Certificates
- Flight engineer, Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 15,401 total · 902 in this make and model · 201 in the last 90 days · 74 in the last 30 days · 7 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 10 statute miles
- Lowest ceiling
- None
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.