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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

January 18, 2017 · Beech 95-C55 · N303QB

Delta, CO

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
January 18, 2017
Injury Outcomes
No injuries (1 uninjured)
Location
Delta, CO
Aircraft
Beech 95-C55 (1966)
Tail Number
N303QB
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN17LA091

The airplane experienced a gear-up landing after the private pilot was unable to extend the landing gear. Postaccident examination of the landing gear motor revealed that the sector gear teeth were partially sheared and were bound with the worm gear teeth, resulting in interference. Once the gear was turned past the sheared area, the assembly functioned with no anomalies. Review of maintenance logs revealed that the most recent annual inspection, which included the landing gear system, was completed about 6 months before the accident with no anomalies noted.

NTSB Probable Cause

The failure of the landing gear to extend during landing approach due to the interference between the landing gear motor's sector and worm gears.

Full Narrative

On January 18, 2017, at 1630 mountain standard time, a Beech 95-C55, N303QB, experienced a gear-up landing at Blake Field Airport, Delta, Colorado, after the pilot was unable to extend the landing gear using normal and emergency procedures. The airplane sustained substantial damage on impact with the runway surface. The pilot was uninjured. The airplane was registered to and operated by the pilot under 14 Code of Federal Regulations Part 91 as a personal flight that was not operating on a flight plan. Visual meteorological conditions prevailed at the time of the accident. The flight originated from an unknown location. A National Transportation Safety Board (NTSB) Pilot Operator Aircraft Accident/Incident Report, Form 6120.1 was not received from the pilot, who was required to complete and submit the form following email and phone requests by the NTSB Investigator-In-Charge. The pilot was also requested to provide his pilot logbook but that request was not complied with. A post-accident disassembly examination, by a maintenance facility, of the airplane landing gearbox showed that there were three labels attached to the gearbox exterior: a "Beech Aircraft Corporation", part number "95-810017-23 ECH," serial number "94-B-479," a Beechcraft Rebuilt Part," part number "95-810017-23 ECH," serial number "94-B-479," and a "Cruiseair Aviation, Inc." with no part or serial number annotated. The examination revealed that the sector gear was against the stop "so hard" that the bolt for the stop could not be removed until the assembly half screws were removed. The sector gear teeth were partially sheared and were bound with worm gear teeth resulting in interference. Once the gear was turned past the sheared area, the assembly worked "fine." An airplane logbook entry dated November 22, 2014 stated that at a tachometer time of 5,211.40 hours and unknown total time, the landing gear failed to electrically extend and the emergency gear handle was hard to turn for the first two turns. The landing gearbox was sent to "Cruiseair" for "repair/inspection." Gearbox, part number "95-810017-25," serial number "94-13-479," was overhauled and reinstalled. The entry states that there were no defects found when the landing gear was cycled three times, and an emergency landing gear extension was performed. An airplane logbook entry dated July 19, 2016 stated that an airplane total time of 5,239.7 hours, the "landing gear, motor, and actuating linkage" were inspected during an annual inspection. The airplane was placed on jacks and the landing gear was cycled and an emergency landing gear extension was performed with "satisfactory results."

Flight

Event TypeAccident
Event Time16:30 MST
Nearest AirportBlake Field Airport (0nm)
Runway3
Runway Length5598 ft
Runway Width75 ft
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftBeech 95-C55
Tail NumberN303QB
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · IO-520 · Reciprocating | Continental · IO-520 · Reciprocating

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 78 · Unknown · None

Conditions

ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point46 / 27 C
Altimeter30.01 inHg
Observation Time23:35
Weather SourceWFAC

Appendix: Source Data