ASN logo
ASN Wikibase Occurrence # 237358
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Time:21:12 UTC
Type:Silhouette image of generic AT72 model; specific model in this crash may look slightly different    
ATR 72-600 (72-212A)
Owner/operator:Royal Air Maroc Express
Registration: CN-COH
MSN: 1034
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Minor
Category:Serious incident
Location:Benslimane Airport (GMMB) -   Morocco
Phase: Taxi
Departure airport:Benslimane Airport (GMMB)
Destination airport:Casablanca/Mohammed V Airport (GMMN)
Confidence Rating: Accident investigation report completed and information captured
On 27 July 2016 at 20:30, the crew boarded the aircraft 30 minutes before the airport closure (GMMB) for a positioning flight to Casablanca/Mohammed V Airport (GMMN).
After starting the engines at 20:54, the crew taxied to the taxiway and received clearance for take-off at 21:00 on runway Runway 32.
During the first take-off attempt, speed indication problems appeared. The take-off phase continued until an uncommanded lift-off. The captan then decided to abort the take-off (RTO). He taxied back to runway Runway 32 for a second take-off.
At 21:08 UTC, the captain carried out a second take-off. This second take-off attempt was deliberately aborted because of a speed indication problem (IAS DISAGREE) characterised by a difference in speed indication between the captain's side and the first officer's side. The aircraft proceeded up runway 32 and then up the ramp. At about 21:12, while taxiing, and just after the left turn to the overrun ramp, the air traffic controller advised the aircraft crew of the presence of a fire on the right engine and immediately alerted the Airport Aircraft Rescue and Firefighting Service (ARFFS). The crew followed the right-engine fire procedure and then evacuated the aircraft.
An ARFF intervention brought the landing gear fire under control.
The aircraft had just come out of the technical check (Check A) carried out in an approved maintenance workshop at Benslimane Airport (GMMB).

Direct Causes
- Obstruction of the Pitot probes which caused an underestimation of the take-off speed ;
- Take-off speed deviation not identified during the first attempt, due to non-application of operational procedures ;
- Excessive braking actions and durations following the two consecutive RTOs aggravated by high-speed "Flight Idle" taxiing.
2. Contributing factors
- Absence of ATR manufacturer's procedures relating to brake cooling following an RTO ;
- Time pressure related to airport closure ;
- CRM failure ;
- Human factors aspects such as stress and the strong captain ascent gradient in relation to the co-pilot's reactions ;
- Risks related to the nature of the Benslimane airport environment which could obstruct the tubes of the pitot probes when they are not protected (Presence of impurities/insects).


Accident investigation:
Investigating agency: 
Status: Investigation completed
Download report: Final report


Photo of CN-COH courtesy

Valencia (LEVC / VLC)
22 January 2013; (c) Streep

Revision history:

25-Jun-2020 18:32 harro Added

Corrections or additions? ... Edit this accident description

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2022 Flight Safety Foundation

701 N. Fairfax St., Ste. 250
Alexandria, Virginia 22314