Miscom between flight crew and ATC. Aircraft equipment problem resulting in reduced climb performanc...

Attributes
ACN	111070
Time
Date	198905
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fll
State Reference	FL
Altitude	msl bound lower : 12000 msl bound upper : 12000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other cruise other
Route In Use	departure other 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 : 150 flight time total : 8500 flight time type : 3000
ASRS Report	111070
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 11000 flight time type : 1400
ASRS Report	111075
Events
Anomaly	inflight encounter : weather other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : unable
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

On departure leg from fll, departure controller assigned an altitude of 16000' and a turn to 300 degree heading to intercept J20. He requested a rapid climb to 16000', and we advised that we would be unable. Due to heavy gross weight and multiple pressurization and pneumatic problems, we could not comply. He then stated that he needed a turn to 270 degrees for traffic since we couldn't rapidly climb. Shortly we approached cumulus cloud buildups and shower activity on our course. We advised the controller that we could not accept a turn to 360 degrees due to WX, and he responded in an irritated voice to maintain 12000' and to request WX deviation heading earlier. We could not understand his irritation when responding, other than the fact that he must have forgotten that he initially assigned the 270 degree heading due to our slow climb and traffic congestion. This poor communication generated concern that we had deviated from an assigned heading and generated a traffic conflict. Supplemental information from acn 111075: it is my belief that amended in flight clrncs in the #1 cause of communication breakdown between pilot and controller. In most cases they involve course intercepts and altitude crossing restrictions.

Original NASA ASRS Text

Title: MISCOM BETWEEN FLT CREW AND ATC. ACFT EQUIPMENT PROBLEM RESULTING IN REDUCED CLIMB PERFORMANCE.

Narrative: ON DEP LEG FROM FLL, DEP CTLR ASSIGNED AN ALT OF 16000' AND A TURN TO 300 DEG HDG TO INTERCEPT J20. HE REQUESTED A RAPID CLB TO 16000', AND WE ADVISED THAT WE WOULD BE UNABLE. DUE TO HEAVY GROSS WT AND MULTIPLE PRESSURIZATION AND PNEUMATIC PROBS, WE COULD NOT COMPLY. HE THEN STATED THAT HE NEEDED A TURN TO 270 DEGS FOR TFC SINCE WE COULDN'T RAPIDLY CLB. SHORTLY WE APCHED CUMULUS CLOUD BUILDUPS AND SHOWER ACTIVITY ON OUR COURSE. WE ADVISED THE CTLR THAT WE COULD NOT ACCEPT A TURN TO 360 DEGS DUE TO WX, AND HE RESPONDED IN AN IRRITATED VOICE TO MAINTAIN 12000' AND TO REQUEST WX DEVIATION HDG EARLIER. WE COULD NOT UNDERSTAND HIS IRRITATION WHEN RESPONDING, OTHER THAN THE FACT THAT HE MUST HAVE FORGOTTEN THAT HE INITIALLY ASSIGNED THE 270 DEG HDG DUE TO OUR SLOW CLB AND TFC CONGESTION. THIS POOR COM GENERATED CONCERN THAT WE HAD DEVIATED FROM AN ASSIGNED HDG AND GENERATED A TFC CONFLICT. SUPPLEMENTAL INFO FROM ACN 111075: IT IS MY BELIEF THAT AMENDED IN FLT CLRNCS IN THE #1 CAUSE OF COM BREAKDOWN BTWN PLT AND CTLR. IN MOST CASES THEY INVOLVE COURSE INTERCEPTS AND ALT XING RESTRICTIONS.

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.

Miscom between flight crew and ATC. Aircraft equipment problem resulting in reduced climb performance.