Crash of a De Havilland DHC-6 Twin Otter 200 in Louisburg

Date & Time: Sep 6, 2015 at 1540 LT
Operator:
Registration:
N181CS
Flight Phase:
Survivors:
Yes
Schedule:
Washington - Louisburg
MSN:
181
YOM:
1968
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
7337
Captain / Total hours on type:
1058.00
Copilot / Total flying hours:
3187
Copilot / Total hours on type:
1180
Aircraft flight hours:
26915
Circumstances:
The airline transport pilot was conducting a cross-country aerial observation flight in the multiengine airplane. The pilot reported that the airplane was on the final leg of the traffic pattern when he reduced the power levers for landing and noticed that the right engine sounded like the propeller was moving toward the beta position. The pilot increased the engine power, and the sound stopped. As the airplane got closer to the runway, he decreased the engine power, and the sound returned. In addition, the airplane began to yaw right. The pilot applied left aileron and rudder inputs to remain above the runway centerline without success. While over the runway, the pilot reduced the engine power to idle, and the airplane continued to yaw right. The pilot applied full power in an attempt to perform a go-around; however, the airplane yawed about 30 degrees off the runway centerline, touched down in the grass, and impacted trees before coming to rest. The right wing, right engine, and right propeller assembly were impact-separated. The right engine propeller came to rest about 50 ft forward of the main wreckage, and it was found in the feathered position. A review of maintenance records revealed that the right propeller had been overhauled and reinstalled on the airplane 2 days before the accident and had operated 9 hours since that time. Subsequent testing of the right propeller governor revealed that it functioned without anomaly; however, the speed settings were improperly configured. Further, the testing revealed that the beta valve travel from the neutral position was out of tolerance. Although this could have let oil pressure port to one side of the spool or the other and, thus, changed the propeller blade angle, it could not be determined whether this occurred during the accident landing. Impact damage precluded examination of the right propeller governor control linkage; therefore, it could not be determined if it was inadequately installed or rigged, which could have resulted in the propeller moving into the beta position. The investigation could not determine why the right propeller moved toward the beta position as engine power was reduced, as reported the pilot.
Probable cause:
The propeller’s movement to the beta position during landing for reasons that could not be determined during postaccident examination and testing, which resulted in an attempted goaround and subsequent loss of airplane control.
Final Report:

Crash of a Saab 340 in Washington DC

Date & Time: Jun 8, 2005 at 2137 LT
Type of aircraft:
Operator:
Registration:
N40SZ
Survivors:
Yes
Schedule:
White Plains-Washington DC
MSN:
040
YOM:
1985
Flight number:
UA7564
Crew on board:
3
Crew fatalities:
Pax on board:
27
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
4673
Captain / Total hours on type:
3476.00
Aircraft flight hours:
41441
Circumstances:
On final approach, the right main gear was not fully extended and locked. Ground personnel observed that the right landing gear was extended but could not confirm that it was locked. On landing on runway 19L, the right landing gear collapsed and the aircraft came to rest in a grassy area. Nobody was hurt but the aircraft was damaged beyond economical repair.

Crash of a Boeing 757 in Washington DC: 64 killed

Date & Time: Sep 11, 2001 at 0945 LT
Type of aircraft:
Operator:
Registration:
N644AA
Flight Phase:
Survivors:
No
Site:
Schedule:
Washington-Los Angeles
MSN:
24602
YOM:
1991
Flight number:
AA077
Crew on board:
6
Crew fatalities:
Pax on board:
58
Pax fatalities:
Other fatalities:
Total fatalities:
64
Aircraft flight hours:
33432
Aircraft flight cycles:
11789

Crash of a Piper PA-31 Navajo Chieftain in Southport

Date & Time: Mar 22, 1998 at 1050 LT
Registration:
N715PM
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Southport-Washington DC
MSN:
31-493
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
955
Captain / Total hours on type:
260.00
Aircraft flight hours:
694

Crash of a Beechcraft King Air 90 in Wheeling

Date & Time: Nov 13, 1997 at 2141 LT
Type of aircraft:
Operator:
Registration:
N80GP
Survivors:
Yes
Schedule:
Bristol-Washington DC
MSN:
LJ-0137
YOM:
1966
Crew on board:
2
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
10000
Captain / Total hours on type:
100.00
Aircraft flight hours:
7290

Crash of a Learjet 25 in Washington DC: 12 killed

Date & Time: Jun 18, 1994 at 0625 LT
Type of aircraft:
Operator:
Registration:
XA-BBA
Survivors:
No
Schedule:
Mexico-New Orleans-Washington
MSN:
25-223
YOM:
1977
Crew on board:
2
Crew fatalities:
Pax on board:
10
Pax fatalities:
Other fatalities:
Total fatalities:
12
Aircraft flight hours:
6118
Aircraft flight cycles:
5664

Crash of a Swearingen SA226T Merlin in Winchester: 1 killed

Date & Time: Mar 18, 1994 at 0050 LT
Type of aircraft:
Operator:
Registration:
N20PT
Flight Type:
Survivors:
No
Schedule:
Washington-Winchester
MSN:
T26-128
YOM:
1969
Crew on board:
1
Crew fatalities:
Pax fatalities:
Other fatalities:
Total fatalities:
1
Captain / Total flying hours:
3382
Captain / Total hours on type:
568.00
Aircraft flight hours:
5869

Crash of a Bae Jetstream 41 in Columbus: 5 killed

Date & Time: Jan 7, 1994 at 2321 LT
Type of aircraft:
Operator:
Registration:
N304UE
Survivors:
Yes
Schedule:
Washington-Columbus
MSN:
41016
YOM:
1993
Flight number:
UA6291
Crew on board:
3
Crew fatalities:
Pax on board:
6
Pax fatalities:
Other fatalities:
Total fatalities:
5
Captain / Total flying hours:
3660
Captain / Total hours on type:
192.00
Copilot / Total flying hours:
2430
Copilot / Total hours on type:
31
Aircraft flight hours:
1069
Aircraft flight cycles:
1000

Crash of a Piper PA-31 Cheyenne in Toledo: 3 killed

Date & Time: Jan 31, 1992 at 1606 LT
Type of aircraft:
Operator:
Registration:
N6038A
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Toledo-Washington
MSN:
31-7820072
YOM:
1978
Location:
Crew on board:
1
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
6850

Crash of a Cessna 421 Golden Eagle in Chesapeake

Date & Time: Nov 28, 1989 at 1815 LT
Type of aircraft:
Registration:
N3359Q
Survivors:
Yes
Schedule:
Washington-Chesapeake
MSN:
421-0243
YOM:
1972
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
10800
Captain / Total hours on type:
35.00