- Date
- June 6, 1993, 22:28 local (Jun 7, 1993, 06:28 UTC)
- Place
- Anchorage, AK
- Injuries
- 2 uninjured
- Damage
- Minor damage
- Phase of flight
- Landing
- Aircraft
- N673MABoeing 737-200
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 26, 1994
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19930607019809I
- Case key
- 2319
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
The failure of the nose landing gear inner cylinder from an overload/overstress condition.
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.
Analysis
While taxiing off the runway at dillingham, Alaska, the flight crew heard a 'pop' and 'grinding' sound. The airplane was subsequently ferried to Anchorage with the nose gear pinned in the down position. Upon touchdown in Anchorage, the nose gear separated from the airplane. A metallurgical examination of the affected components, primarily the nose landing gear inner cylinder, showed that the inner cylinder had separated close to the lower end near the axles for the tires. Visual examination of the fracture surface with the aid of a bench binocular microscope revealed features typical of an overstress separation including chevron marks over the majority of the fracture surface and the presence of a 45 degree fracture plane. During the previous 12 month period there were no 'hard' landings on record for the airplane.
Aircraft
- Registration
- N673MA
- Reported as
- Boeing 737-200
- Category
- Airplane
- Serial number
- 23124
- Airframe hours
- 25,472
- Engine
- P&W JT8D-17A, turbo fan
- Damage
- Minor damage
- Flight
- Ferry · Part 91
- Operator
- Markair Inc.
- Registered owner
- Markair Inc.
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · June 6, 1993 · 1 hours before
- Departed
- DLG · Dillingham, AK
- Flight plan
- IFR
- Airport
- ANC · Anchorage International, runway 14, 10,496 × 150 ft, asphalt
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 43
- Certificates
- Airline transport, Commercial
- Airplane ratings
- Single-engine land, Single-engine sea, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 7,500 total · 3,000 in this make and model · 112 in the last 90 days · 26 in the last 30 days · 6 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 140° at 12 knots
- Visibility
- 60 statute miles
- Lowest ceiling
- 12,000 ft broken
- Temperature
- 52 °F, dew point 39 °F
- Altimeter
- 29.00 inHg
- Observed at
- ANC, 1 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.