- Date
- June 6, 1991, 16:39 local (20:39 UTC)
- Place
- Boston, MA
- Injuries
- 156 uninjured
- Damage
- Minor damage
- Phase of flight
- Takeoff
- Aircraft
- N750UABoeing 727-214
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 3, 1993
- Report
- Approved by Office Director
- Case key
- 36815
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
The failure of the third stage turbine blade on the number two engine, due to high cycle fatigue.
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
Just after takeoff, the pilot said, 'a loud noise was heard accompanied by high EGT on the number 2 engine.' The crew shut down the engine and landed without incident. An examination of the engine revealed an uncontained engine failure. Damage to the airplane was minor. A third stage turbine blade failed due to high cycle fatigue on the leading edge of the blade.
Aircraft
- Registration
- N750UA
- Reported as
- Boeing 727-214
- Category
- Airplane
- Serial number
- 709108
- Engine
- P&W JT8D-15A, 15,100 lbs thrust, turbo fan
- Damage
- Minor damage
- Flight
- Part 121
- Operator
- Usair
- Registered owner
- Usair
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Unknown · January 2, 2000
- Destination
- CLT · Charlotte, NC
- Flight plan
- IFR
- Airport
- BOS · Logan International, runway 9, 9,000 × 150 ft
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
- 50
- Certificates
- Airline transport, Commercial, Private
- Airplane ratings
- Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Flight hours
- 12,500 total · 5,500 in this make and model · 8,000 as pilot in command · 180 in the last 90 days · 65 in the last 30 days · 7 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 10 statute miles
- Lowest ceiling
- None