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NTSB Report
July 26, 2013 · Cessna 172S · N635ND
Phoenix, AZ
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 26, 2013
Location
Phoenix, AZ
Aircraft
Cessna 172S
Tail Number
N635ND
Operator
The Und Aerospace Foundation
Aircraft Damage
Substantial
NTSB Number
WPR13CA348
During a preflight inspection, a flight instructor discovered that the airplane’s firewall was substantially damaged. The operator reported that the damage occurred during an unknown flight operation. The airplane's last maintenance inspection occurred about a month prior to the discovery, equating to about 52 flight hours. Numerous pilots flew the airplane during that duration, none of which reported an event that would result in damage to the airplane. A determination as to the cause of the accident could not be made.
NTSB Probable Cause
A substantially damaged firewall that occurred during an unknown phase of flight for reasons that could not be determined.
Full Narrative
During a preflight inspection, a certified flight instructor discovered that the airplane’s firewall was substantially damaged. The operator reported that the damage occurred during an unknown flight operation. The airplane's last maintenance inspection occurred about a month prior to the discovery, equating to about 52 flight hours. Numerous pilots flew the airplane during that duration, none of which reported an event that would result in damage to the airplane. A determination as to the cause of the accident could not be made.
Flight
Event TypeAccident
Event Time12:00 MST
Nearest AirportPhoenix-Mesa Gateway Airport (0nm)
Runway30R
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft
AircraftCessna 172S
Tail NumberN635ND
Aircraft CategoryAir
DamageSubstantial
OperatorThe Und Aerospace Foundation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · IO-360L2A · Reciprocating · 180
Seats4
People & Injuries
Fatal0
Serious0
Minor0
Uninjured0
Total0
Crew 1Age 99 · Unknown
Conditions
ConditionsVMC
LightNr
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0