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DEN04LA140

2004-09-08 · Casper, Wyoming, United States · None · 1 aircraft · Status: Completed

Airport CPR

Current FAA registration · N1551L

Make / Model
BEECH B-60
Year of manufacture
1976 · 28 years old at event
Engine
LYCOMING TI0-541 SER (310 hp)
Seats / Engines
6 seats · 2 engines
Last airworthiness date
19760615
ADS-B equipped
Yes — Mode-S A0DF48

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

the missing nose gear assembly bolt, spacer and nut resulting in a gear collapse due to improper maintenance procedures. Contributing to the accident was the collision with the storm drain.

Factual narrative

On September 8, 2004, at approximately 1415 mountain daylight time, a Beech B-60, N1551L, piloted by a private pilot, was substantially damaged when it impacted terrain while taxiing at Natrona County International Airport (CPR), Casper, Wyoming. Visual meteorological conditions prevailed at the time of the accident. The business flight was being conducted under the provisions of Title 14 CFR Part 91 without a flight plan. The pilot reported no injuries. The cross-country flight originated in Riverton, Wyoming, at approximately 1130. According to the accident report submitted by the pilot, he had been taxiing south on Alpha taxiway and was departing the taxiway en route to the Trajen Air ramp area when the nose gear struck a storm drain. The nose gear collapsed and the airplane skid approximately 6 to 10 feet before coming to rest on its nose. Both propellers struck the ground and the wheel well structure was crushed and torn. According to the ramp agent that was marshalling the airplane to parking, the airplane was taxiing at a slow pace when it impacted the storm drain, bounced, collapsing the nose gear and slid. A postaccident examination of the airplane by the FAA revealed that the nose gear bolt, spacer and nut were missing. No other anomalies were noted. According to the pilot, the bolt had been replaced on September 1, 2004. In an FAA interview with the mechanic, it was discovered that the Beech maintenance procedures had not been followed while servicing the nose gear. The difference in elevation between the storm drain and the abutting pavement was 1 inch. Title 14 CFR Part 139.305, Paved Areas, states that, "The pavement edges must not exceed 3 inches difference in elevation between abutting pavement sections and between pavement and abutting areas." The pilot stated that he was taxiing to the ramp, when the airplane's nose gear struck a storm drain, causing it to collapse and substantially damaging the wheel well. A postaccident examination of the airplane by the FAA revealed that the nose gear bolt, spacer and nut were missing. No other anomalies were noted. According to the pilot, the bolt had been replaced on September 1, 2004. In an FAA interview with the mechanic, it was discovered that the Beech maintenance procedures had not been followed while servicing the nose gear. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_2004_DEN04LA140.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (icing, maintenance). All research papers