<< >> NASA ASRS Report 424040, December 1998

B737 flight crew turns opposite direction of clearance while contemplating dispute over airspeed clearance near bonham, tx.

Attributes
ACN	424040
Time
Date	199812
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : byp
State Reference	TX
Altitude	msl bound lower : 25000 msl bound upper : 25000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Operator	common carrier : air carrier
Flight Phase	cruise other descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 100 flight time total : 6000 flight time type : 400
ASRS Report	424040
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	atc equipment other atc equipment : unspecified other controllera other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Air Traffic Incident	Pilot Deviation

Narrative:

While on descent, center asked us our airspeed. After we stated it, he told us we should be going approximately 250 KTS. Neither the captain nor I heard a speed restr given to us and we are certain he did not. At this time we were given a right turn 30 degrees to sequence us back in with traffic and airspeed change to approximately 250 KTS. Inadvertently the captain turned left 30 degrees instead of right 30 degrees. Once the controller realized our error he turned us further left and then direct byp to join the arrival. There was never a traffic conflict. I feel the reason for us missing the right turn and instead turning left was because of frequency congestion and the controller's insistence that we also missed an airspeed change (he should have just gave us the turn and stopped talking about who was at fault for the airspeed). By the time he finished talking I could not remember which way we were supposed to turn (we had already turned left).

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Original NASA ASRS Text

Title: B737 FLC TURNS OPPOSITE DIRECTION OF CLRNC WHILE CONTEMPLATING DISPUTE OVER AIRSPD CLRNC NEAR BONHAM, TX.

Narrative: WHILE ON DSCNT, CTR ASKED US OUR AIRSPD. AFTER WE STATED IT, HE TOLD US WE SHOULD BE GOING APPROX 250 KTS. NEITHER THE CAPT NOR I HEARD A SPD RESTR GIVEN TO US AND WE ARE CERTAIN HE DID NOT. AT THIS TIME WE WERE GIVEN A R TURN 30 DEGS TO SEQUENCE US BACK IN WITH TFC AND AIRSPD CHANGE TO APPROX 250 KTS. INADVERTENTLY THE CAPT TURNED L 30 DEGS INSTEAD OF R 30 DEGS. ONCE THE CTLR REALIZED OUR ERROR HE TURNED US FURTHER L AND THEN DIRECT BYP TO JOIN THE ARR. THERE WAS NEVER A TFC CONFLICT. I FEEL THE REASON FOR US MISSING THE R TURN AND INSTEAD TURNING L WAS BECAUSE OF FREQ CONGESTION AND THE CTLR'S INSISTENCE THAT WE ALSO MISSED AN AIRSPD CHANGE (HE SHOULD HAVE JUST GAVE US THE TURN AND STOPPED TALKING ABOUT WHO WAS AT FAULT FOR THE AIRSPD). BY THE TIME HE FINISHED TALKING I COULD NOT REMEMBER WHICH WAY WE WERE SUPPOSED TO TURN (WE HAD ALREADY TURNED L).

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.