Date:	Saturday 30 July 2022
Time:	21:06
Type:	Boeing 737-86N (WL)
Owner/operator:	Nok Air
Registration:	HS-DBR
MSN:	43420/5031
Year of manufacture:	2014
Total airframe hrs:	21694 hours
Engine model:	CFMI CFM56-7B26
Fatalities:	Fatalities: 0 / Occupants: 170
Other fatalities:	0
Aircraft damage:	Substantial, repaired
Category:	Accident
Location:	Chiang Rai-Mae Fah Luang International Airport (CEI) -   Thailand
Phase:	Landing
Nature:	Passenger - Scheduled
Departure airport:	Bangkok-Don Muang International Airport (DMK/VTBD)
Destination airport:	Chiang Rai-Mae Fah Luang International Airport (CEI/VTCT)
Investigating agency:	AAIC Thailand
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Nok Air flight 108, a Boeing 737-86N, suffered a runway excursion after landing on runway 03 at Chiang Rai, Thailand.
The aircraft veered off the left side of the runway while landing. The nose landing gear collapsed and the aircraft came to rest in grass.
At the time of the incident a thunderstorm was passing through the area.


Causes
1. When the aircraft deviated to the left and exited the runway. The pilot might have made fewer corrections than necessary because;
(1) The co-pilot could use his right foot to push the right rudder pedal. As a result, the pilot might not have fully used the right rudder pedal.
(2) The pilot did not use reverse thrust levers immediately after touching down the runway, causing the aircraft to maintain speed and be unable to control its direction in order to stay on the runway centerline.
2. The nose landing gear had a problem that could cause it to deviate from the runway. According to the maintenance history, the nose landing gear wheels had been replaced several times in the previous 6 months due to the vibrations during takeoff and wheels that were more worn than usual.
3. Based on recorded data,an abnormality in the nose landing gear steering system could not be ruled out.
4. It was possible that the aircraft's deviation to the left was caused by increased crosswind from the left.

14:00 UTC / 21:00 local time:
VTCT 301400Z 33006KT 5000 -TSRA FEW018CB SCT018 BKN030 OVC049 25/25 Q1008 TEMPO 2000 TSRA

15:00 UTC / 22:00 local time:
VTCT 301500Z 16006KT 140V200 8000 -TSRA FEW020CB SCT026 OVC048 23/23 Q1008 BECMG NSW

nationthailand.com
thaipbsworld.com

Other occurrences involving this aircraft


30 August 2015	HS-DBR	Nok Air	0	Between Nakhon Si Thammarat and Surat Thani		unk
Bird strike

Date/time	Contributor	Updates
15-Dec-2024 19:28	ASN	Updated [Damage, Accident report, ]
20-Oct-2025 16:25	ASN	Updated [Narrative, Accident report, ]
20-Oct-2025 16:54	ASN	Updated
20-Oct-2025 17:28	ASN	Updated