Flight crew lost communication and flight director on missed approach.

Attributes
ACN	298178
Time
Date	199503
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ama
State Reference	TX
Altitude	msl bound lower : 4400 msl bound upper : 4500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ama tracon : pia
Operator	general aviation : personal
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 91
Navigation In Use	Other Other
Flight Phase	landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 35 flight time total : 13500 flight time type : 2500
ASRS Report	298178
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Aircraft on customer demonstration flight from dal. Conducted several approachs to kama with missed approach/go around. On last missed approach while in right turn to 090 degrees and climbing to assigned altitude, PNF experienced communication failure and flight/director system failed to provide proper pitch guidance to assigned altitude. Aircraft leveled off for period of time at 7500 ft AGL (4400-4500 ft MSL) position pitch input made and flight director system reprogrammed to attain desired flight path. Communication problem resolved with change of handling pilot (original PNF had audio/transmit failure). Restored audio to other pilot when clear of kama area. Returned to kdal without further event. Discrepancy entered on maintenance sheets. Note: aircraft had been OTS for 30-60 days prior to flight. All equipment checked satisfactory on preflight.

Original NASA ASRS Text

Title: FLC LOST COM AND FLT DIRECTOR ON MISSED APCH.

Narrative: ACFT ON CUSTOMER DEMO FLT FROM DAL. CONDUCTED SEVERAL APCHS TO KAMA WITH MISSED APCH/GAR. ON LAST MISSED APCH WHILE IN R TURN TO 090 DEGS AND CLBING TO ASSIGNED ALT, PNF EXPERIENCED COM FAILURE AND FLT/DIRECTOR SYS FAILED TO PROVIDE PROPER PITCH GUIDANCE TO ASSIGNED ALT. ACFT LEVELED OFF FOR PERIOD OF TIME AT 7500 FT AGL (4400-4500 FT MSL) POS PITCH INPUT MADE AND FLT DIRECTOR SYS REPROGRAMMED TO ATTAIN DESIRED FLT PATH. COM PROB RESOLVED WITH CHANGE OF HANDLING PLT (ORIGINAL PNF HAD AUDIO/XMIT FAILURE). RESTORED AUDIO TO OTHER PLT WHEN CLR OF KAMA AREA. RETURNED TO KDAL WITHOUT FURTHER EVENT. DISCREPANCY ENTERED ON MAINT SHEETS. NOTE: ACFT HAD BEEN OTS FOR 30-60 DAYS PRIOR TO FLT. ALL EQUIP CHKED SATISFACTORY ON PREFLT.

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.