<< >> NASA ASRS Report 440410, June 1999

Cpr pilot did not hear clearance so failed to start descent in time to make crossing altitude until controller questioned ability to make crossing. Copilot was aware of clearance but did not set alerter.

Attributes
ACN	440410
Time
Date	199906
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fll.airport
State Reference	FL
Altitude	msl bound lower : 8000 msl bound upper : 18000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	general aviation : corporate
Make Model Name	Citation V
Operating Under FAR Part	Part 91
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : multi engine pilot : atp
Experience	flight time last 90 days : 150 flight time total : 14000 flight time type : 3000
ASRS Report	440410
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Failure to comply with crossing altitude assigned by ATC. Level at FL180 we were told to cross kubic intersection at 8000 ft. First officer acknowledged the assignment but did not reset altitude alerter or arm FMS for descent. Captain was briefing passenger (on PA) for turbulence and arrival to fll airspace and did not hear clearance to descend. ATC called to inquire about descent, at which time I deployed speed brakes and initiated a rapid descent 5000 FPM to comply with crossing requirement which we did comply with (less than 1000 ft) lack of good communication procedure caused problem during high workload environment. Solution: all altitude, speed and heading changes are challenge and response items to assure both pilots heard and heard the same thing.

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Original NASA ASRS Text

Title: CPR PLT DID NOT HEAR CLRNC SO FAILED TO START DSCNT IN TIME TO MAKE XING ALT UNTIL CTLR QUESTIONED ABILITY TO MAKE XING. COPLT WAS AWARE OF CLRNC BUT DID NOT SET ALERTER.

Narrative: FAILURE TO COMPLY WITH XING ALT ASSIGNED BY ATC. LEVEL AT FL180 WE WERE TOLD TO CROSS KUBIC INTXN AT 8000 FT. FO ACKNOWLEDGED THE ASSIGNMENT BUT DID NOT RESET ALT ALERTER OR ARM FMS FOR DSCNT. CAPT WAS BRIEFING PAX (ON PA) FOR TURB AND ARR TO FLL AIRSPACE AND DID NOT HEAR CLRNC TO DSND. ATC CALLED TO INQUIRE ABOUT DSCNT, AT WHICH TIME I DEPLOYED SPD BRAKES AND INITIATED A RAPID DSCNT 5000 FPM TO COMPLY WITH XING REQUIREMENT WHICH WE DID COMPLY WITH (LESS THAN 1000 FT) LACK OF GOOD COM PROC CAUSED PROB DURING HIGH WORKLOAD ENVIRONMENT. SOLUTION: ALL ALT, SPD AND HDG CHANGES ARE CHALLENGE AND RESPONSE ITEMS TO ASSURE BOTH PLTS HEARD AND HEARD THE SAME THING.

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.