LAX96LA341

NTSB accident investigation · Beech V35A-TC · Santa Ynez, CA · September 21, 1996

Accident · No injuriesLimited investigationFinal report
Date
September 21, 1996, 14:45 local (21:45 UTC)
Place
Santa Ynez, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N7956MBeech V35A-TC
Weather
Visual (VMC) · Day
Status
Completed · report April 29, 1997
Report
Approved by Office Director
FAA report
19960921029219A
Case key
29565

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

On this page

Probable cause

failure of a maintenance technician to properly torque the fuel injector lines to three cylinders.

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(total) - mech failure/malfApproach
Fuel system,line fitting - looseCause
Fluid,fuel - leakCause
Engine compartment - fireCause
Ignition system - burned
Forced landingEmergency descent/landing
In flight collision with terrain/waterEmergency landing
Terrain condition - rough/uneven

Analysis

During a dual instructional flight, the pilots observed smoke coming from an area behind the instrument panel. The flight instructor (CFI) took control of the aircraft, while they performed the emergency procedure for in-flight fire. The smoke cleared and the instructor gave control back to the owner/pilot. As they were approaching the airport with gear and flaps extended, they attempted to add power to reach the airport. The engine failed to respond, and a forced landing was performed short of the airport. During the forced landing on unprepared terrain, the aircraft was damaged. The aircraft had flown 2.5 hours since the last annual inspection. Postaccident examination revealed three loose injector lines for the left side cylinders. Fuel dye and fire damage was evident on the left side, where the ignition wires were burnt and the cowling was distorted. All fuel injectors had been removed for cleaning and reinstallation with new seals. After the annual inspection, the aircraft had been taken to another shop to repair an engine baffle on the left side. The aircraft had been flown 1.8 hours since repair of the engine baffle.

Factual narrative

On September 21, 1996, about 1445 hours Pacific daylight time, a Beech V35A-TC, N7956M, was substantially damaged during a forced landing at Santa Ynez, California. Visual meteorological conditions prevailed for the local instructional flight and no flight plan was filed. Neither of the pilots were injured.

According to a telephone interview conducted by an FAA inspector, the left seat pilot, who had just purchased the aircraft, was flying when they observed smoke coming from behind the instrument panel. The instructor pilot took control and proceeded to follow the emergency procedures for smoke/fire. The smoke cleared from the cockpit and the instructor gave control back to the owner pilot. They stated that even with the electrical master switch off they still had some lights and radios. As they were approaching the airport (with flaps still down and gear extended from the emergency checklist procedure), they could not add any additional engine power. The instructor again took control of the aircraft and performed the emergency landing.

A postaccident examination of the engine compartment was conducted by an FAA inspector. The examination revealed that the fuel injector lines to cylinders 2, 4, and 6 were loose. There were fuel stains on the cylinders and other left side components of the engine installation. A fire had occurred in the left aft side of the engine compartment and burnt the ignition leads and hoses in the area.

On August 30, 1996, an annual inspection was performed on the aircraft at a tachometer reading of 2,100.4 hours. According to the maintenance records, all fuel injectors were removed and reinstalled with new seals. After the annual inspection the aircraft was taken to another airport for a left-hand engine baffle repair at 2,101.9 hours. At the time of the accident the recording tachometer indicated 2,102.9 hours.

Aircraft

Registration
N7956M
Reported as
Beech V35A-TC
Category
Airplane
Serial number
D-8823
Airframe hours
3,262
Engine
Continental TSIO-520-D, 285 horsepower, reciprocating
Damage
Substantial damage
Fire
In-Flight
Flight
Personal · Part 91
Registered owner
David M. Mcelroy
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 30, 1996 · 2 hours before
Departed
IZA · CA
Destination
SBA · Santa Barbara, CA

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
32
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
1,380 total · 1,100 as pilot in command · 190 in the last 90 days · 30 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
30 statute miles
Lowest ceiling
None
Temperature
70 °F
Observed at
IZA

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 N7956M · 1

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