ATC flight crew miscom. Previous controller had issued altitude clearance, flight crew read it back and inserted it into their FMC. Next controller said they were at the wrong altitude, but that there was no conflict and cleared them to a higher altitude.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	339735
Time
Date	199606
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : mgm
State Reference	AL
Altitude	msl bound lower : 28000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl tower : hou
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 300 flight time total : 10700 flight time type : 3000
ASRS Report	339735
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 90
ASRS Report	339101
Events
Anomaly	non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

We leveled off at FL290 in the climb. Shortly thereafter, ZTL asked us our assigned altitude and we replied FL290. ZTL said that we should have leveled at FL280 and said he would check with the last sector. He then came back and said we had been given FL280. We had set, and I believe I read back, FL290, the altitude that the aircraft leveled at on the autoplt. ATC informed us that there had been no conflict and cleared us to the next frequency where we were given a new clearance to climb to FL310 as a final altitude.

Original NASA ASRS Text

Title: ATC FLC MISCOM. PREVIOUS CTLR HAD ISSUED ALT CLRNC, FLC READ IT BACK AND INSERTED IT INTO THEIR FMC. NEXT CTLR SAID THEY WERE AT THE WRONG ALT, BUT THAT THERE WAS NO CONFLICT AND CLRED THEM TO A HIGHER ALT.

Narrative: WE LEVELED OFF AT FL290 IN THE CLB. SHORTLY THEREAFTER, ZTL ASKED US OUR ASSIGNED ALT AND WE REPLIED FL290. ZTL SAID THAT WE SHOULD HAVE LEVELED AT FL280 AND SAID HE WOULD CHK WITH THE LAST SECTOR. HE THEN CAME BACK AND SAID WE HAD BEEN GIVEN FL280. WE HAD SET, AND I BELIEVE I READ BACK, FL290, THE ALT THAT THE ACFT LEVELED AT ON THE AUTOPLT. ATC INFORMED US THAT THERE HAD BEEN NO CONFLICT AND CLRED US TO THE NEXT FREQ WHERE WE WERE GIVEN A NEW CLRNC TO CLB TO FL310 AS A FINAL ALT.

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.