|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||atc facility : olm|
|Altitude||msl bound lower : 33000|
msl bound upper : 37000
|Controlling Facilities||artcc : zse|
|Operator||common carrier : air carrier|
|Make Model Name||Large Transport, Low Wing, 3 Turbojet Eng|
|Flight Phase||climbout : intermediate altitude|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 230|
flight time total : 11500
flight time type : 1300
|Affiliation||government : faa|
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||other anomaly other|
|Independent Detector||other controllera|
|Resolutory Action||none taken : anomaly accepted|
|Primary Problem||ATC Human Performance|
|Air Traffic Incident||Operational Deviation|
Upon first contact with ZSE after leaving sea/tac departure control, we were cleared to FL370. This seemed a bit unusual as we're usually assigned an interim altitude (FL230) until handed off to high level controller. Upon next frequency change, we checked in as climbing to FL370 and were acknowledged. Upon leaving FL345 controller asked, 'what altitude are you cleared to?' we responded, 'FL370.' he said he thought we were only cleared to FL330. We told him who had assigned us FL370 and reminded him that we had checked in with him as climbing to FL370. Controller apparently checked with previous controller and told us everything was straightened out. As an aside to this incident, our computerized flight plan called for an initial climb to FL330 with a further climb to FL370 as burnout permitted. We accepted the FL370 clearance because our weight revision during taxiout had a substantial fall off which put FL370 within reach as an initial cruise altitude.
Original NASA ASRS Text
Title: ATC CLEARED FLT TO WRONG ALT.
Narrative: UPON FIRST CONTACT WITH ZSE AFTER LEAVING SEA/TAC DEP CTL, WE WERE CLRED TO FL370. THIS SEEMED A BIT UNUSUAL AS WE'RE USUALLY ASSIGNED AN INTERIM ALT (FL230) UNTIL HANDED OFF TO HIGH LEVEL CTLR. UPON NEXT FREQ CHANGE, WE CHKED IN AS CLBING TO FL370 AND WERE ACKNOWLEDGED. UPON LEAVING FL345 CTLR ASKED, 'WHAT ALT ARE YOU CLRED TO?' WE RESPONDED, 'FL370.' HE SAID HE THOUGHT WE WERE ONLY CLRED TO FL330. WE TOLD HIM WHO HAD ASSIGNED US FL370 AND REMINDED HIM THAT WE HAD CHKED IN WITH HIM AS CLBING TO FL370. CTLR APPARENTLY CHKED WITH PREVIOUS CTLR AND TOLD US EVERYTHING WAS STRAIGHTENED OUT. AS AN ASIDE TO THIS INCIDENT, OUR COMPUTERIZED FLT PLAN CALLED FOR AN INITIAL CLB TO FL330 WITH A FURTHER CLB TO FL370 AS BURNOUT PERMITTED. WE ACCEPTED THE FL370 CLRNC BECAUSE OUR WEIGHT REVISION DURING TAXIOUT HAD A SUBSTANTIAL FALL OFF WHICH PUT FL370 WITHIN REACH AS AN INITIAL CRUISE ALT.
Data retrieved from NASA's ASRS site as of August 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.