ASRS REPORT: 80231
Data Source |
AVIATION SAFETY REPORTING SYSTEM |
Report Number |
80231 |
Local Date |
01-JAN-88 |
Local Time |
1201-1800 |
Synopsis
ACR INADVERTENTLY CLIMBED OUT OF ASSIGNED ALT.
Assessment
Event Primary Problem |
HUMAN FACTORS |
Flight Crew Event Results |
RETURNED TO CLEARANCE |
Anomaly Information
Alt Deviation Anomaly Desc |
EXCURSION FROM ASSIGNED ALTITUDE |
Other Anomaly Flag |
UNSPECIFIED |
Anomaly Detected - Person Desc |
AIR TRAFFIC CONTROL |
Location Information
Loc State Code |
MI |
Loc Ref ATC Name |
ELX |
Reference ID Distance (nm) |
5 |
Altitude MSL - Single Value(ft)
| 33000 |
Environmental Information
Weather Conditions |
VMC |
Light Condition |
DAYLIGHT
|
AIRCRAFT INFORMATION
Aircraft 1
Acft Make/Model Desc |
HEAVY TRANSPORT, LOW WING, 4 TURBOJET ENG |
Acft Operator Desc |
AIR CARRIER |
Acft Flight Mission |
PASSENGER |
Acft Flight Phase |
CLIMB |
Acft Flight Plan |
IFR |
Flight Crew Count |
3 |
PERSON INFORMATION
Information For Person Sequence 1
Reporting Organization |
AIR CARRIER |
Flt Crew Exp (last 90 days) |
210 |
Flt Crew Total Exp |
14000 |
Flt Crew Exp |
6000 |
Flt Crew Function |
FIRST OFFICER |
Flt Crew Qual Desc |
INSTRUMENT |
Narrative
WE WERE FLYING HVT X FROM ORD AND CLRD TO FL330 EXPECTING CLRNC TO FL370. AT APPROX FL320 WE ACKNOWLEDGED A CLRNC TO FL370. APCHING FL340 CHI CENTER ASKED US WHAT OUR ALT WAS. WE REPLIED, "FL340 CLBING TO FL370." WE WERE INSTRUCTED TO DES TO FL330 IMMEDIATELY. AT APPROX FL335 WE WERE THEN CLRD TO FL370. PRIOR TO THIS, IN THE EARLY PART OF THE CLB, WE TOLD THE CENTER CTLR THAT HIS TRANSMISSIONS WERE NOT CLEAR, LIKE HE WAS TALKING INSIDE A BARREL. TRANSMISSIONS FROM OTHER ACFT WERE CLEAR. THE CTLR TRIED OTHER MICS AND TRANSMITTERS WITH NO IMPROVEMENT. IN TRYING TO ASSESS THE REASON FOR THE ALT CLRNC MISUNDERSTANDING, WE CONCLUDED THAT WE HAD ACKNOWLEDGED AN ALT CLRNC FOR ANOTHER ACFT. POSSIBLY THAT ACFT ACKNOWLEDGED THE CLRNC AT THE SAME TIME WE DID, THUS BLOCKING CENTER FROM HEARING THE MISTAKE. ANOTHER FACTOR WAS THAT WE HAD JUST RECEIVED A ROUTE CHANGE SO BOTH OF US WERE SOMEWHAT ENGROSSED IN OUR MAPS WHEN THE ALT CLRNC WAS RECEIVED. SUPPLEMENTAL INFORMATION FROM ACN 80230: 2 COMPANY FLTS IN AREA WITH SIMILAR CALL SIGNS WERE ON FREQ. WE BELIEVE BOTH TRIPS READ BACK CLRNC AT SAME TIME SMEARING EACH OTHER.
Information For Person Sequence 2
Reporting Organization |
AIR CARRIER |
Flt Crew Total Exp |
22000 |
Flt Crew Function |
PILOT FLYING |
Flt Crew Qual Desc |
INSTRUMENT |
Narrative
Information For Person Sequence 3
Reporting Organization |
AIR CARRIER |
Flt Crew Exp (last 90 days) |
100 |
Flt Crew Total Exp |
15000 |
Flt Crew Exp |
7500 |
Flt Crew Function |
FLIGHT ENGINEER / SECOND OFFICER |
Flt Crew Qual Desc |
INSTRUMENT |
Narrative
Information For Person Sequence 4
ATC Function |
ENROUTE |
ATC Qual Desc |
FULLY CERTIFIED |
Narrative
END REPORT