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NTSB Report
January 12, 1985 · Cessna T210L · N4691Q
San Jose, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
January 12, 1985
Injury Outcomes
No injuries (1 uninjured)
Location
San Jose, CA
Aircraft
Cessna T210L
Tail Number
N4691Q
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX85LA108
DURING FIRST LEG OF THE FLIGHT, PLT DISCOVERED THAT LANDING GEAR WOULD NOT EXTEND. PRESSURIZING 'DOWN SIDE' WITH EMERGENCY HAND PUMP ALLOWED NORMAL OPERATION OF THE LANDING GEAR. ON RETURN FLT TO SAN JOSE, PLT TRIED TO EXTEND THE GEAR BUT SYSTEM WOULD NOT WORK WITH EITHER THE NORMAL OR EMERGENCY SYSTEM. ACFT LANDED GEAR UP AND INCURRED SUBSTANTIAL DAMAGE. SUBSEQUENT EXAMINATION OF THE HYDRAULIC SYSTEM DISCLOSED A ONE-HALF INCH PIECE OF PACKING IN THE NOSE GEAR MANIFOLD NEAR THE DOOR CLOSE VALVE, AND A THERMAL RELIEF VALVE STUCK IN THE OPEN POSITION BY A BUILD-UP OF 'DARK COLORED GREASY RESIDUE' ON THE SPRING.
Full Narrative
DURING FIRST LEG OF THE FLIGHT, PLT DISCOVERED THAT LANDING GEAR WOULD NOT EXTEND. PRESSURIZING 'DOWN SIDE' WITH EMERGENCY HAND PUMP ALLOWED NORMAL OPERATION OF THE LANDING GEAR. ON RETURN FLT TO SAN JOSE, PLT TRIED TO EXTEND THE GEAR BUT SYSTEM WOULD NOT WORK WITH EITHER THE NORMAL OR EMERGENCY SYSTEM. ACFT LANDED GEAR UP AND INCURRED SUBSTANTIAL DAMAGE. SUBSEQUENT EXAMINATION OF THE HYDRAULIC SYSTEM DISCLOSED A ONE-HALF INCH PIECE OF PACKING IN THE NOSE GEAR MANIFOLD NEAR THE DOOR CLOSE VALVE, AND A THERMAL RELIEF VALVE STUCK IN THE OPEN POSITION BY A BUILD-UP OF 'DARK COLORED GREASY RESIDUE' ON THE SPRING.
Flight
Event TypeAccident
Event Time22:27 PST
Nearest AirportSan Jose Muni (0nm N)
Runway30R
Runway Length4419 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna T210L
Tail NumberN4691Q
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520 · Reciprocating · 285
Seats6
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 58 · Second Class
Conditions
ConditionsVMC
LightDark Night
Wind300° @ 8 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point45 C / 30 C
Altimeter30.00 inHg
Observation Time06:27
Weather SourceWFAC