<< >> NASA ASRS Report 325801, January 1996

B727 flight crew receives TCASII TA then RA. Takes evasive action, acquires traffic. Controller says cleared to FL260, not FL270.

Attributes
ACN	325801
Time
Date	199601
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : djb
State Reference	OH
Altitude	msl bound lower : 26000 msl bound upper : 27000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob artcc : zdv
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 110 flight time total : 10500
ASRS Report	325801
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : overshoot non adherence : far non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Climbing out from buf, ATC cleared us to FL270. Another controller later cleared us to a heading of 255 degrees and direct to dryer (djb, 113.6). Approaching FL260 during the climb to FL270 at a rate of 1200 FPM, we got a TA/RA on TCASII. We monitored vertical speed and descended to FL257 and visually acquired the traffic. The traffic passed in our vicinity at FL270. ZOB pointed the traffic out about the same time we started a descent. After the TA/RA resolved we leveled off at FL260. When we queried the controller about the TCASII incident, he told us he had cleared us to FL260 at the time he gave us the 255 degree heading. Nobody on the crew could recall a FL260 hold down but we all copied and complied with the 255 degree heading. ATC said the aircraft at FL270 also initiated a TA/RA action. Good that TA/RA worked to resolve conflict and that controller also pointed out our traffic. Not good that verification of altitude change was not received.

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Original NASA ASRS Text

Title: B727 FLC RECEIVES TCASII TA THEN RA. TAKES EVASIVE ACTION, ACQUIRES TFC. CTLR SAYS CLRED TO FL260, NOT FL270.

Narrative: CLBING OUT FROM BUF, ATC CLRED US TO FL270. ANOTHER CTLR LATER CLRED US TO A HDG OF 255 DEGS AND DIRECT TO DRYER (DJB, 113.6). APCHING FL260 DURING THE CLB TO FL270 AT A RATE OF 1200 FPM, WE GOT A TA/RA ON TCASII. WE MONITORED VERT SPD AND DSNDED TO FL257 AND VISUALLY ACQUIRED THE TFC. THE TFC PASSED IN OUR VICINITY AT FL270. ZOB POINTED THE TFC OUT ABOUT THE SAME TIME WE STARTED A DSCNT. AFTER THE TA/RA RESOLVED WE LEVELED OFF AT FL260. WHEN WE QUERIED THE CTLR ABOUT THE TCASII INCIDENT, HE TOLD US HE HAD CLRED US TO FL260 AT THE TIME HE GAVE US THE 255 DEG HDG. NOBODY ON THE CREW COULD RECALL A FL260 HOLD DOWN BUT WE ALL COPIED AND COMPLIED WITH THE 255 DEG HDG. ATC SAID THE ACFT AT FL270 ALSO INITIATED A TA/RA ACTION. GOOD THAT TA/RA WORKED TO RESOLVE CONFLICT AND THAT CTLR ALSO POINTED OUT OUR TFC. NOT GOOD THAT VERIFICATION OF ALT CHANGE WAS NOT RECEIVED.

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.