DEN89LA214

NTSB accident investigation · Piper PA-18A-150 · Winston, NM · September 12, 1989

Accident · Serious injuriesLimited investigationFinal report
Date
September 11, 1989, 18:15 local (Sep 12, 1989, 00:15 UTC)
Place
Winston, NM
Injuries
1 serious
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N9496DPiper PA-18A-150
Weather
Visual (VMC) · Day
Status
Completed · report April 13, 1992
Report
Approved by Office Director
FAA report
19890911034439A
Case key
17781

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

Deteriorated carburetor float. Factors related to the accident were: high density altitude and the terrain conditions in the emergency landing area.

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.

Loss of engine power(partial) - mech failure/malfTakeoff - initial climb
Fuel system,carburetor float - deterioratedCause
Fuel system,screen - blocked(partial)
Weather condition - high density altitudeFactor
Forced landingDescent - emergency
In flight collision with terrain/waterLanding
Terrain condition - high obstruction(s)Factor
Terrain condition - rough/unevenFactor

Analysis

The plt leaned the mixture & took off on rwy 30, a high alt dirt strip with a 3.8% uphill gradient. Winds were from the nnw at abt 14 KTS. At aprx 200' to 300' AGL, the eng began to lose power. The acft settled & crashed on rocky terrain as the plt was avoiding trees. Fire consumed the acft. A teardown of the marvel-schebler MA4-SPA carb revealed it contained a composite float (which was deteriorated), part of the float toe was missing & the needle valve was stuck. The valve & seat were covered with a soft/sticky substance & the inlet filter screen was almost entirely blocked by foreign debris. An STC had been issued for N9496D, which allowed use of auto fuel.

Aircraft

Registration
N9496D
Reported as
Piper PA-18A-150
Category
Airplane
Serial number
18-6748
Airframe hours
2,522
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
Kramer, John Edward
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 12, 1989 · 18 hours before
Departed
1E3
Destination
NM51 · Edgewood, NM
Airport
1E3 · Beaverhead, runway 30, 3,840 × 60 ft, dirt

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
Certificates
Commercial, Flight engineer, Airline transport, Flight instructor
Airplane ratings
Single-engine land, Single-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
7,914 total · 25 in this make and model · 3,318 as pilot in command · 258 in the last 90 days · 98 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
325° at 14 knots, gusting 24
Visibility
100 statute miles
Lowest ceiling
None
Temperature
61 °F

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 N9496D · 1

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