| Date: | Sunday 6 October 2013 |
| Time: | 09:07 |
| Type: |  Saab 340B |
| Owner/operator: | Nok Mini Airlines |
| Registration: | HS-GBG |
| MSN: | 340B-453 |
| Year of manufacture: | 1998 |
| Total airframe hrs: | 29042 hours |
| Engine model: | General Electric CT7-9B |
| Fatalities: | Fatalities: 0 / Occupants: 28 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial, written off |
| Category: | Accident |
| Location: | Udon Thani Airport (UTH) -
 Thailand
|
| Phase: | Taxi |
| Nature: | Passenger - Scheduled |
| Departure airport: | Chiang Mai International Airport (CNX/VTCC) |
| Udon Thani RTAFB (UTH/VTUD) | |
| Investigating agency: | AAIC Thailand |
| Confidence Rating: |  Accident investigation report completed and information captured |
A Saab 340B turboprop suffered a taxiway excursion after landing at Udon Thani Airport (UTH), Thailand. No injuries were reported.
Nok Air Mini flight DD8610 originated in Chiang Mai, Thailand. The airplane ran off the right side of the taxiway into the grass, causing the nose landing gear to collapse.
It has been reported that the hydraulic pump failed before landing. The crew used the manual pump to extend gear and flaps. Landing was normal and when the airplane vacated the runway there was a loss of control of brakes and steering on the parallel taxiway. After the pilot stopped the aircraft using reverse thrust, he set the parking brake and shut down the engine. The aircraft continued to move foreword out of the taxiway with a 3 degree down slope and hit a sign post, causing the collapse of the nose gear.
Causes
The Aircraft Accident Investigation Committee considered that the accident is caused by both pilots did not follow the Abnormal Procedures in the Aircraft Operations Manual to solve the hydraulic system malfunction when the single chime came on several times, during the flight. Until commencing the holding, the pilots performed the Abnormal Procedures on Hydraulic Fluid Lost but not complete and correct. After landing, the pilot taxied the aircraft from the runway to the apron, during that time, the nose landing gear steering and the brake systems were inoperative because hydraulic pressure in two accumulators decreased until unable to supply to those two systems. Subsequently, the pilots were unable to control the direction and stop the aircraft. The aircraft veered off the taxiway and hit the concrete base of the aerodrome information sign. The aircraft was destroyed.
Accident investigation:
 |
|
Sources:
NNT
Pattaya Mail
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Dec-2024 14:06 | ASN | Updated [Time, Phase, Destination airport, Narrative, Accident report, ] |
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