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Last updated: 18 November 2018
Status:Final
Date:Wednesday 11 June 2014
Time:06:20
Type:Silhouette image of generic AT76 model; specific model in this crash may look slightly different
ATR 72-600 (72-212A)
Operator:Wings Air
Registration: PK-WGK
C/n / msn: 1106
First flight: 2013-08-13 (10 months)
Total airframe hrs:1642
Cycles:1825
Engines: 2 Pratt & Whitney Canada PW127M
Crew:Fatalities: 0 / Occupants: 4
Passengers:Fatalities: 0 / Occupants: 55
Total:Fatalities: 0 / Occupants: 59
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Surabaya-Juanda Airport (SUB) (   Indonesia)
Phase: Landing (LDG)
Nature:Domestic Scheduled Passenger
Departure airport:Lombok International Airport (LOP/WADL), Indonesia
Destination airport:Surabaya-Juanda Airport (SUB/WARR), Indonesia
Flightnumber:IW1861
Narrative:
The airport operator of Surabaya-Juanda International Airport, Indonesia, planned to perform runway maintenance that would be conducted at night after the runway operation.
On 11 June 2014, between 0100 to 0500 LT, runway maintenance was performed by a group of 10 workers, using tools including pneumatic compressor, jack hammer, chisel, high air pressure hose, asphalt mixer, small container for asphalt mixture, debris sweeper and other supporting equipment.
At 04:05 LT, the Airport Facility Readiness personnel conducted a runway readiness check in conjunction with patrolling the airside using a patrol car. At 04:30 LT, they reported to the Juanda Tower controller that the runway was clear from any hazard except the area near intersection N3 where the runway repair was still in progress. At 04:50 LT, the airport maintenance team reported to Juanda Tower controller that the runway repair had finished and the runway maintenance team had left the runway. No runway inspection was performed after the runway repair finished.
The airport opened for traffic at 05:00 as planned. Until 06:06 hours, a total of eleven aircraft departed and one aircraft arrived. No pilot reported any foreign objects on the runway. The first pilot report of objects was near the intersection taxiway N5 and was made at 06:09 LT which was after sunrise at 05:59 LT. At 06:15 LT, the controller contacted the Airport Facility Readiness personnel but received no reply. Thereafter the controller contacted the ARFF personnel and informed them of the pilot report of an object on the runway and requested a check. When the ARFF vehicle arrived near the runway the controller instructed to wait for three aircraft that were about to land.
At 06:20 LT, an ATR 72-600 (PK-WGK) with flight number IW1861 landed and impacted the chisel, which resulted in eight holes in the aircraft lower fuselage.
The controller then decided to close the runway operation and instructed the ARFF personnel to enter and inspect the runway. The ARFF personnel found a compressor hose (about 10 meters long), a jack hammer (about 60 cm long) and chisel (about 4.5 kg) on the runway.

Probable Cause:

Contributing Factors:
- The runway inspection that was performed while the runway maintenance has not been finished resulted in the object which were on dark color and found on dark surface did not properly inspect.
- The insufficient information regarding the objects and the location might have made improper assessment to the consequences of the runway operation and delaying the object removal.

Accident investigation:
cover
Investigating agency: NTSC Indonesia
Status: Investigation completed
Duration: 4 years and 4 months
Accident number: KNKT.14.06.13.04
Download report: Final report

Classification:



Follow-up / safety actions

NTSC issued 6 Safety Recommendations

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Photos

photo of ATR 72-600 (72-212A) PK-WGK
photo of ATR 72-600 (72-212A) PK-WGK
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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Lombok International Airport to Surabaya-Juanda Airport as the crow flies is 412 km (257 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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