- Date
- October 21, 1975
- Place
- Boston, MA · BOSTON, MA
- Injuries
- 128 uninjured
- Damage
- Minor damage
- Phase of flight
- Initial climb
- Aircraft
- N4711UBoeing 747
- Status
- Completed · report January 16, 1976
- Report
- Brief approved by the director
- Case key
- 151326
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
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NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 4-0028 75/10/21 BOSTON,MA BOEING 747 CR- 0 0 14 SCHED DOM PASSG SRV AIRLINE TRANSPORT, AGE TIME - 0946 N4711U PX- 0 0114 UNK/NR, UNK/NR TOTAL DAMAGE-MINOR OT- 0 0 0 HOURS, UNK/NR IN TYPE, INSTRUMENT RATED. CLASSIFIED AS INCIDENT NAME OF AIRPORT - LOGAN INTL OPERATOR - UNITED AIR LINES,INC. DEPARTURE POINT INTENDED DESTINATION BOSTON,MA SAN FRANCISCO,CA TYPE OF ACCIDENT PHASE OF OPERATION AIRFRAME FAILURE: IN FLIGHT TAKEOFF: INITIAL CLIMB PROBABLE CAUSE(S) SYSTEMS - FLIGHT CONTROL SYSTEMS: WING LEADING EDGE FLAP SYSTEM MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE MISCELLANEOUS ACTS,CONDITIONS - SHEARED EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING ON AIRPORT SUSPECTED OR KNOWN AIRCRAFT DAMAGE REMARKS- ELECT-PNEU DRIVE UNIT SHEAR PINS(P/N 885004-1,112479-39),LMT SWTCHES (P/N 886039-6,886149-2) FAILD
Aircraft
- Registration
- N4711U
- Reported as
- Boeing 747
- Category
- Airplane
- Engine
- turbo fan
- Damage
- Minor damage
- Airport
- Logan Intl