MINR · BOEING 747-422 · 1990-08-27 · LOS ANGELES, CA, USA
Event
NTSB number
LAX90IA305
Event ID
20001212X24039
Type
Incident
Date
1990-08-27
Location
LOS ANGELES, CA, USA
Coordinates
33.950046, -118.400817
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
23
Uninjured
320
Total aboard
345
Aircraft
Make
BOEING
Model
747-422
Registration
N174UA
FAR Part
121
Engines
4
Damage
MINR
Conditions
Light
DAYL
Weather
VMC
Probable cause
THE FAILURE OF THE MANUFACTURER TO ENSURE THAT THE LANDING GEAR SELECTOR VALVES AND THEIR ASSOCIATED DRUM LINK ASSEMBLIES WERE PROPERLY INSTALLED PRIOR TO DELIVERY OF THE AIRCRAFT. A FACTOR IN THE ACCIDENT WAS THE LACK OF INFORMATION AVAILABLE TO THE CREW CONCERNING THE SECONDARY ALTERNATE GEAR EXTENSION PROCDURE.