Los Angeles – Denver – Milwaukee

Boeing 727-22C N7434U operated Flight 266 from Los Angeles to Denver, CO and Milwaukee, WI. The aircraft had been operating since January 15, 1969, with the No. 3 generator inoperative. This was allowed because according to the Minimum Equipment List, the aircraft is airworthy with only two generators operable provided certain procedures are followed and electrical loads are monitored during flight. Flight 266 was scheduled to depart the gate at 17:55, but was delayed until 18:07 because of the inclement weather and loading problems. The flight commenced its takeoff roll on runway 24 at approximately 18:17. At 18:18:30 the sound of an engine fire warning bell was heard in the cockpit. The crew reported a no. 1 engine fire warning and stated that they wanted to return to the airport. Shortly after shutdown of the No. 1 engine, electrical power from the remaining generator (No. 2) was lost. Following loss of all generator power, the standby electrical system either was not activated or failed to function. Electrical power at a voltage level of approximately 50 volts was restored approximately a minute and a half after loss of the No. 2 generator. The duration of this power restoration was just 9 to 15 seconds. The Boeing descended and struck the sea 11.3 miles west of the airport. The ocean depth at this point is approximately 950 feet.

Flight / Schedule

Los Angeles – Denver – Milwaukee

Aircraft

Boeing 727-100

Registration

N7434U

MSN

19891/631

Year of Manufacture

1968

Operator

United Airlines

Date

January 18, 1969 at 06:21 PM

Type

CRASH

Flight Type

Scheduled Revenue Flight

Flight Phase

Takeoff (climb)

Crash Site

Lake, Sea, Ocean, River

Crash Location

Los Angeles California

Region

North America • United States of America

Coordinates

34.0587°, -118.4165°

Crash Cause

Technical failure

Narrative Report

On January 18, 1969 at 06:21 PM, Los Angeles – Denver – Milwaukee experienced a crash involving Boeing 727-100, operated by United Airlines, with the event recorded near Los Angeles California.

The flight was categorized as scheduled revenue flight and the reported phase was takeoff (climb) at a lake, sea, ocean, river crash site.

38 people were known to be on board, 38 fatalities were recorded, 0 survivors were identified or estimated. This corresponds to an estimated fatality rate of 100.0%.

Crew on board: 6, crew fatalities: 6, passengers on board: 32, passenger fatalities: 32, other fatalities: 0.

The listed crash cause is technical failure. Boeing 727-22C N7434U operated Flight 266 from Los Angeles to Denver, CO and Milwaukee, WI. The aircraft had been operating since January 15, 1969, with the No. 3 generator inoperative. This was allowed because according to the Minimum Equipment List, the aircraft is airworthy with only two generators operable provided certain procedures are followed and electrical loads are monitored during flight. Flight 266 was scheduled to depart the gate at 17:55, but was delayed until 18:07 because of the inclement weather and loading problems. The flight commenced its takeoff roll on runway 24 at approximately 18:17. At 18:18:30 the sound of an engine fire warning bell was heard in the cockpit. The crew reported a no. 1 engine fire warning and stated that they wanted to return to the airport. Shortly after shutdown of the No. 1 engine, electrical power from the remaining generator (No. 2) was lost. Following loss of all generator power, the standby electrical system either was not activated or failed to function. Electrical power at a voltage level of approximately 50 volts was restored approximately a minute and a half after loss of the No. 2 generator. The duration of this power restoration was just 9 to 15 seconds. The Boeing descended and struck the sea 11.3 miles west of the airport. The ocean depth at this point is approximately 950 feet.

Aircraft reference details include registration N7434U, MSN 19891/631, year of manufacture 1968.

Geospatial coordinates for this crash are approximately 34.0587°, -118.4165°.

Fatalities

Total

38

Crew

6

Passengers

32

Other

0

Crash Summary

Boeing 727-22C N7434U operated Flight 266 from Los Angeles to Denver, CO and Milwaukee, WI. The aircraft had been operating since January 15, 1969, with the No. 3 generator inoperative. This was allowed because according to the Minimum Equipment List, the aircraft is airworthy with only two generators operable provided certain procedures are followed and electrical loads are monitored during flight. Flight 266 was scheduled to depart the gate at 17:55, but was delayed until 18:07 because of the inclement weather and loading problems. The flight commenced its takeoff roll on runway 24 at approximately 18:17. At 18:18:30 the sound of an engine fire warning bell was heard in the cockpit. The crew reported a no. 1 engine fire warning and stated that they wanted to return to the airport. Shortly after shutdown of the No. 1 engine, electrical power from the remaining generator (No. 2) was lost. Following loss of all generator power, the standby electrical system either was not activated or failed to function. Electrical power at a voltage level of approximately 50 volts was restored approximately a minute and a half after loss of the No. 2 generator. The duration of this power restoration was just 9 to 15 seconds. The Boeing descended and struck the sea 11.3 miles west of the airport. The ocean depth at this point is approximately 950 feet.

Cause: Technical failure

Occupants & Outcome

Crew On Board

6

Passengers On Board

32

Estimated Survivors

0

Fatality Rate

100.0%

Known people on board: 38

Operational Details

Schedule / Flight

Los Angeles – Denver – Milwaukee

Operator

United Airlines

Flight Type

Scheduled Revenue Flight

Flight Phase

Takeoff (climb)

Crash Site

Lake, Sea, Ocean, River

Region / Country

North America • United States of America

Aircraft Details

Aircraft

Boeing 727-100

Registration

N7434U

MSN

19891/631

Year of Manufacture

1968