DEN91LA053

NTSB accident investigation · Rockwell 112B · Nederland, CO · March 18, 1991

Accident · Serious injuriesLimited investigationFinal report
Date
March 18, 1991, 13:00 local (20:00 UTC)
Place
Nederland, CO
Injuries
2 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1241JRockwell 112B
Weather
Visual (VMC) · Day
Status
Completed · report May 3, 1993
Report
Approved by Office Director
FAA report
19910318005659A
Case key
18076

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

Deteriorated ignition harness and ignition lead arcing. Factors were the high density altitude and lack of suitable terrain for the forced landing.

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/malfClimb
Weather condition - high density altitudeFactor
Ignition system,ignition harness - deterioratedCause
Ignition system,ignition lead - arcingCause
Forced landingDescent - emergency
In flight collision with terrain/waterLanding - flare/touchdown
Terrain condition - none suitableFactor
Terrain condition - mountainous/hilly
Terrain condition - snow covered

Analysis

As the airplane entered a mountain pass, the pilot noticed decreasing engine manifold pressure. Unable to clear higher terrain, he made a forced landing in deep snow. Post-accident examination revealed the right ignition harness was deteriorated and the ignition leads had arced. The left ignition harness (slick 1200 series) had been altered with the use of unapproved bendix 'pancake' grommets. The airplane had flown 129 hrs since the last annual inspection. Conditions prevented recovery of the wreckage until 6/27/91. Total time on the engine was 1,714 hrs. Recommended overhaul interval was 1,800 hrs.

Aircraft

Registration
N1241J
Reported as
Rockwell 112B
Category
Airplane
Serial number
504
Engine
Lycoming IO-360-C1D6, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Berger, Henry M. & June H.
Registered owner
Berger, Henry M. & June H.
Departed
BJC · Broomfield, CO
Destination
SBS · Steamboat Sprin, CO
Flight plan
VFR

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
68
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Flight hours
7,241 total · 317 in this make and model · 7,129 as pilot in command · 31 in the last 90 days · 17 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -0 °F
Observed at
SBS, 65 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.