REPUBLIC OF KENYA
MINISTRY OF TRANSPORT
DEPARTMENT OF AIR ACCIDENT INVESTIGATION
P.O. Box 52696 Nairobi
Telephone: 254-20-2729200 Fax: 254-20-2737320
CIVIL AIRCRAFT INCIDENT REPORT
CAV/INC/AUC/06
OPERATOR: BLUE NILE AVIATION (E.A.) LIMITED
AIRCRAFT: CESSNA 206
REGISTRATION: 5Y - AUC
PLACE: MANDERA AIRFIELD
DATE: 9TH
NOVEMBER 2006
TIME: 1540 HOURS
All times given in this report are Coordinated Universal Time (UTC). East
African Local Time is UTC plus 3 hours.
AIRCRAFT TYPE: Cessna P206E
MANUFACTURER: Cessna Aircraft Company
YEAR OF MANUFACTURE: 1970
AIRCRAFT REGISTRATION: 5Y - AUC
AIRCRAFT SERIAL NUMBER: P - 206 - 00637
DATE OF REGISTRATION: 10th
February 1986
TYPE OF ENGINE: Continental IO-520-A
DATE OF ACCIDENT: 9th
November 2006
TIME OF ACCIDENT: 1540 hours
LOCATION OF ACCIDENT: Mandera Airstrip
TYPE OF FLIGHT: Public Transport (Passenger)
NUMBER OF PERSONS ON BOARD: Crew – 1 Passengers – 2
INJURIES: Crew – Minor Passengers – None
NATURE OF DAMAGE: Nose landing gear, propeller and cargo
bay damaged
TABLE OF CONTENTS
SYNOPSIS .......................................................................... 1
1 HISTORY OF THE FLIGHT ........................................... 1
1.1 PERSONNEL INFORMATION .................................... 2
1.2 AIRCRAFT INFORMATION ....................................... 2
1.3 AERODROME INFORMATION ................................... 3
1.4 FLIGHT PLANNING............ Error! Bookmark not defined.
1.5 LANDING DISTANCE ................................................ 5
1.6 ORGANIZATIONAL AND MANAGEMENT
INFORMATION ................................................................ 5
2 ANALYSIS ................................................................... 7
3 CONCLUSION ............................................................. 9
4 SAFETY RECOMMENDATIONS ..................................11
5 APPENDIX ................................................................12
SYNOPSIS
The Air Accident Investigation Department was informed of the incident
at Mandera on 9th November 2006 by the pilot. We arrived at the site on
11th November 2006 and commenced investigations. The aircraft, a
Cessna 206 registration 5Y-AUC, departed the runway as it landed at
Mandera Airstrip at night and ended up in the ditch about 150 meters
from the end of the runway. The pilot had minor injuries while the other
two occupants were not injured. The aircraft suffered minor damage.
Figure 1 5Y-AUC at accident site. Note the ditch before the aircraft came to rest
1 History of the flight
The aircraft, a Cessna 206 registration 5Y-AUC, departed Wilson
Airport at 1159 hours. The aircraft was taking two mechanics to
Mandera to recover another aircraft. The planned landing time was
estimated to be 1544 hours. The aircraft had a fuel endurance of 5
hours. Wajir Airfield, which the pilot estimated was about 1.3 hours
from Mandera, was the alternate. When the aircraft arrived at
Mandera, at about 1535 hours, it was already dark. The pilot circled
the Airfield twice before he landed. Meanwhile, the Army Unit on the
ground positioned two vehicles to assist with the runway lighting.
One lorry was placed at the threshold of runway 05 and the other
near the end of the runway. The pilot landed on runway 05. As the
aircraft rolled down the runway, the pilot states that he tried to avoid
hitting the lorry near the end of the runway by swerving to the right
and back to the center line. He, however, lost directional control due
to the bushes at the end of the runway and the aircraft went into a
ditch, coming to a stop approximately 150 meters from the end of
the runway.
The pilot smashed his face on the instrument panel and had a small
cut on the nose. He was stitched at the local hospital and
discharged. The two mechanics were not injured. They all exited the
aircraft safely. There was no fire.
The aircraft nose wheel disengaged from the oleo strut and the fiber
glass cargo bay was damaged. Two blades of the three blade
propeller were slightly bent.
2
1.1 Personnel information
The pilot held a valid commercial pilot licence (CPL) number YK-
5604-CL with a Cessna 206 rating. He also has an instructor rating
on the Cessna 150. His medical certificate was valid up to March
2007. He had accumulated 2000 hours, of which 1320 were on
rotary wing and 680 were on fixed wing. He had 150 hours on the
Cessna 206. The pilot was on hire to Blue Nile (EA) Limited.
The pilot had operated at Mandera while he was a helicopter pilot in
the Army. As a civilian pilot, he had landed at Mandera only once
before, about 3 months ago, in a Cessna 172. This was his second
landing at the Airstrip.
The day before the accident, the pilot had a check out flight on the
Piper PA 28 for about 1 hour. He was due to have a simulator class
in Nairobi on 10th November 2006 at 0930 hours.
1.2 Aircraft information
The aircraft was a Cessna P206E, serial number P206 - 00637,
registration number 5Y - AUC. It was issued with a certificate of
registration number 986 - D on 10th February 1986 and had a
current certificate of airworthiness number 1007. The certificate of
airworthiness was issued in the public transport category. The
aircraft was manufactured in 1970. Since new the aircraft had
3
accumulated 6246.5 hours including 918.03 hours since the last
check III inspection.
The aircraft was equipped with a Teledyne Continental Motors
model IO – 520A 14B engine, which had accumulated 692.03 hours
since new. Fitted to the engine was a McCauley variable pitch 3-
blade propeller which had accumulated 918.1 hours since last
overhaul.
1.3 Aerodrome information
The aircraft ran off the runway at Mandera Airstrip. Mandera
Airstrip is unmanned and has only one runway, 05/23. It is about
1100 meters long and 23 meters wide. Runway 05 has a negative
slope of 0.7. There are power lines as you approach to land on
runway 23. The Republic of Kenya Aeronautical Information
Publication (AIP) gives the airport’s coordinates as 035549.0N
0415103.6E. The airport elevation is 805 feet.
The AIP lists the hours of operation at Mandera as sunrise to sunset.
The AIP sunrise/sunset tables give sunset at Garissa (coordinates
002748.34S 0393853.853E) on the 9th November 2006 as 1509
hours. The website www.earthtools.org/ gives sunset for Mandera
(coordinates 3˚ 55′ 34″N 41˚ 50′ 46″E) on the 9th November 2006
as 1454 hours. According to the Civil Aviation Act (CAP 394), “night”
means the time between fifteen minutes after sunset and fifteen
minutes before sunrise. Therefore, by 1509 hours it was night in
4
Mandera. According to CAP 394 of the Laws of Kenya, Air Navigation
Regulation 65(2), An aircraft shall not take off or land by night at any
place in Kenya unless adequate lighting is in operation at the
aerodrome.
There are tall bushes around the runway which should be cleared
as soon as possible. The AIP gives the runway surface as bitumen.
However, the runway surface is, in fact, gravel.
The windsock was noticed to be in tatters and needs to be
replaced. The non-availability of a windsock is covered by AIP
supplement AD S41/05 dated 13th September 2005 which advises
pilots to exercise caution.
There is serious encroachment on the airstrip. Houses have been
built very close to the runway. The accident aircraft could have
smashed into the houses had it not been stopped by a ditch.
The United States Federal Aviation Authority in its Accident
Prevention Program publication FAA-P-8740-50 AFS-810 (1995)
advises as follows:
Never attempt a landing at an unlighted airport, no matter how well you think you
know
it. If in doubt about lighting at your destination, don't be embarrassed. Call Flight
Service.
5
Figure 2
1.4 Landing Distance
The pilot states that he landed about 300 meters from Runway 05
threshold at his normal landing speed of 80 knots. So he had about
800 meters in which to stop the aircraft. According to the Owners
Manual, he needed about 735 feet (225 meters ) to stop the aircraft.
We tested the aircraft brakes during the investigation and they were
in good working order. The lorry that he was trying to avoid was
almost at the end of the runway. The pilot stated that he did not
brake immediately on landing for fear of colliding with the lorry. This
increased his landing run to beyond the end of the runway.
1.5 Organizational and management information
Blue Nile (East Africa) Limited holds a current Air Operators Certificate
(AOC) number 183, valid up to April 2007, for public transport. Blue Nile
(EA) Limited operates two Cessna 206 and 208, and one Beech craft
B100 aircraft.
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The Blue Nile General Operations Manual, Chapter 8, paragraph
8.1.2.1 states that:
No pilot shall use and no operator or owner shall authorize the use of an aerodrome as a
destination or alternate destination aerodrome unless such aerodrome is adequate for
the type of aircraft and the operation concerned.
Paragraph 8.1.2.2 states that:
Except in an emergency no take off or landing will be permitted at night at any
aerodrome that is not equipped with night flying facilities.
Paragraph 8.4.8.1 further states that: All these operations must be strictly carried out under Visual Flight Rules as there are
no landing aids in some of the areas. Therefore night landings and take off are
prohibited in such areas.
2 Analysis
The pilot took off from Wilson Airport at 1159 hrs. The estimated
flight time was 3.75 hrs. The alternate was Wajir, which is 1.3 hrs
before and enroute Mandera. The AIP gives the hours of operation at
Mandera as sunrise to sunset. The calculation of sunset time plus 15
minutes give night at Mandera on the 9th November 2006 as 1509
hours. The pilot arrived at Mandera at about 1535 hours when it was
already dark.
In order to make a daylight landing at Mandera and still have 1.3
hours of daylight to fly to Wajir in case of a diversion, the pilot
needed at least 5.05 Hrs. To arrive at Wajir before sunset (1504
hours), he had to be in Mandera by latest 1344 hours. Considering
that it would take him approximately 3.75 hours from Wilson Airport
to Mandera, he would have had to leave Wilson approximately 5.05
hours before sunset in Wajir, at 0959 hours. He instead left at 1159
hours. Therefore, he took off from Wilson Airport with a shortfall in
daylight hours of approximately 2 hours. Given the best
circumstances in the flight, the aircraft could not have landed safely
at the alternate during the published daylight. In the event the
aircraft actually made a landing at the planned destination at night.
He had no other option but to try and land because his alternate
(Wajir) also had no lighting.
It is against civil aviation regulations (CAP 394) to land by night at
any place in Kenya unless adequate lighting is in operation at the
aerodrome.
8
It is also against Blue Nile (K) Limited operating procedures to take
off or land at night at any aerodrome that is not equipped with night
flying facilities. The pilot landed at Mandera at night. Therefore, this
flight was performed in contravention of Blue Nile (K) Limited
operating procedures.
The pilot had enough landing length to stop the aircraft before the
end of the runway. He, however, did not apply the brakes in good
time leading to the departure from the runway.
3 Conclusion
This incident was caused by the pilot’s poor flight planning and his
decision to land by night on an aerodrome that did not have
lighting.
4 Safety recommendations
4.1 KCAA should ensure that certificated operators including Blue Nile
(K) Limited follow the approved operational standards as spelt out
in their approved operations manuals.
4.2 KCAA should consider further training and/or examination in aircraft
performance and flight planning for the pilot.
4.3 The overrun area of Mandera airstrip, runway 05 should be cleared
of all bushes.
4.4 The current encroachment on Mandera airfield should be stopped.
CIA
5 Appendix Accident photographs
Figure 3
Figure 4
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Figure 5
Figure 6 5Y - AUC after being moved to the parking area