<< >> NASA ASRS Report 466840, March 2000

Flight crew of a cpr jet turned the wrong way during departure climb due to misunderstanding of the first officer and the controller for not catching the error during readback.

Attributes
ACN	466840
Time
Date	200003
Day	Sun
Local Time Of Day	0601 To 1200
Place
State Reference	CA
Altitude	msl bound lower : 0 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc tower : sfo.tower
Operator	general aviation : corporate
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 90 flight time total : 12000 flight time type : 1500
ASRS Report	466840
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued alert none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The flight plan filed route from napa (apc) to oxnard (oxr) was direct sgd direct oak J-1 fim direct hyden direct oxr. An experienced first officer received the clearance from napa ground. He briefed me as follows, clear to oxnard direct to sgd direct oak as filed climb to 8000 ft departure 127.8 squawk XXXX. At sgd VOR I turned left direct oak VOR. About 3-4 mi from sgd VOR ZOA asked which way we turned over sgd VOR. The first officer reported left turn direct to ZOA said the clearance was for a right turn (270 degree turn) not a left turn (90 degree turn) to oak. I suspect the probable cause of confusion over the clearance is in the readback of the clearance by the first officer.

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Original NASA ASRS Text

Title: FLC OF A CPR JET TURNED THE WRONG WAY DURING DEP CLB DUE TO MISUNDERSTANDING OF THE FO AND THE CTLR FOR NOT CATCHING THE ERROR DURING READBACK.

Narrative: THE FLT PLAN FILED RTE FROM NAPA (APC) TO OXNARD (OXR) WAS DIRECT SGD DIRECT OAK J-1 FIM DIRECT HYDEN DIRECT OXR. AN EXPERIENCED FO RECEIVED THE CLRNC FROM NAPA GND. HE BRIEFED ME AS FOLLOWS, CLR TO OXNARD DIRECT TO SGD DIRECT OAK AS FILED CLB TO 8000 FT DEP 127.8 SQUAWK XXXX. AT SGD VOR I TURNED L DIRECT OAK VOR. ABOUT 3-4 MI FROM SGD VOR ZOA ASKED WHICH WAY WE TURNED OVER SGD VOR. THE FO RPTED L TURN DIRECT TO ZOA SAID THE CLRNC WAS FOR A R TURN (270 DEG TURN) NOT A L TURN (90 DEG TURN) TO OAK. I SUSPECT THE PROBABLE CAUSE OF CONFUSION OVER THE CLRNC IS IN THE READBACK OF THE CLRNC BY THE FO.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.