LAX89FA106

NTSB accident investigation · Piper PA-24-260 · Julian, CA · February 12, 1989

Accident · FatalField investigationFinal report
Date
February 12, 1989, 15:43 local (23:43 UTC)
Place
Julian, CA
Injuries
3 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N9240PPiper PA-24-260
Weather
Instrument (IMC) · Day
Status
Completed · report June 22, 1992
Report
Approved by Office Director
FAA report
19890212001969A
Case key
26212

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's poor judgement of intentionally flying into an area of known forecast icing conditions which resulted in a loss of control and an inflight breakup of the aircraft. Contributing factors were the pilot's overconfidence in his personal ability by attempting flight into instrument meteorological conditions, and the adverse weather conditions.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherCruise - normal
Flight into known adverse weather - intentionalPilot in commandCause
Overconfidence in personal abilityPilot in commandFactor
Weather condition - icing conditionsFactor
Weather condition - thunderstormFactor
Weather condition - turbulence(thunderstorms)Factor
Loss of control - in flightCruise - normal
Wing - iceFactor
Horizontal stabilizer surface - iceFactor
Airframe/component/system failure/malfunctionDescent - uncontrolled
Design stress limits of aircraft - exceededPilot in commandCause
Stabilizer - overload
Wing - overload

Analysis

The non-instrument rated pilot first filed an IFR flight plan before obtaining a weather briefing. Light to moderate rime icing was forecast from 5,000 to 16,000 ft. at 1541 the ARTCC controller noticed the mode c altitude report was 1,300 ft lower than the assigned altitude of 10,000 ft, and descending. The pilot responded to the controller's inquiry that 'I cannot maintain altitude'. At 1543 radio and radar contact was lost. An airline flight reported picking up moderate rime ice while flying in the area of the accident site. A ground witness reported that at the time of the accident a thunderstorm was overhead, accompanied by lightning, thunder, hail, and moderate snow and rain showers. The witness also heard a loud 'winding up engine sound followed by a large bang'. The last pitot static system test and calibration was recorded on 7/8/86. The pilot had received about 44 hrs dual instrument training during the first 6 months of 1986.

Aircraft

Registration
N9240P
Reported as
Piper PA-24-260
Category
Airplane
Serial number
24-4739
Airframe hours
2,879
Engine
Lycoming IO-540-D4A5, 260 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
John H. Maloney
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 5, 1987 · 150 hours before
Departed
PSP · Palm Springs, CA
Destination
MYF · San Diego, CA
Flight plan
IFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
35
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
620 total · 480 in this make and model · 581 as pilot in command · 45 in the last 90 days · 12 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Wind
290° at 8 knots
Visibility
15 statute miles
Lowest ceiling
6,000 ft broken
Temperature
57 °F, dew point 34 °F
Altimeter
29.00 inHg
Observed at
TRM, 36 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N9240P · 1

Matched to the same aircraft by N-number and date.