<< >> NASA ASRS Report 762162, November 2007

C310 pilot reports late missed approach and late call to tower after FD GS is discovered to be 'stuck' approaching minimums on ILS in IMC.

Attributes
ACN	762162
Time
Date	200711
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iad.airport
State Reference	VA
Altitude	msl bound lower : 400 msl bound upper : 600
Environment
Flight Conditions	IMC
Weather Elements	Fog
Light	Daylight
Aircraft 1
Controlling Facilities	tower : iad.tower
Operator	general aviation : corporate
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Navigation In Use	ils localizer & glide slope : 19r
Flight Phase	descent : approach landing : go around
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : atp pilot : multi engine
Experience	flight time last 90 days : 25 flight time total : 10010 flight time type : 1000
ASRS Report	762162
Events
Anomaly	aircraft equipment problem : critical non adherence : far
Independent Detector	other flight crewa
Resolutory Action	aircraft : equipment problem dissipated controller : issued new clearance flight crew : executed missed approach
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

Conducting CAT 1 ILS approach to runway 19R ATIS reporting indef 100 RVR 1800; tower reporting RVR 5000-6000 ft. About the time approaching decision ht noted that GS indicator on HSI 'stuck.' #2 ILS indicator (raw data) indicating several dots high. Hesitated while trying to sort it out. Should have executed immediate missed approach. Began late climb out on missed approach and was late on advising tower of miss (approximately 1.5 mi south of departure end of runway). Vectored around for approach on runway 19L: uneventful approach and landing. Tower supervisor asked for phone call. Was concerned about late call on miss because tower (local) did not know position of aircraft until call. On first indication of equipment malfunction should have executed missed approach and notified ATC.

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Original NASA ASRS Text

Title: C310 PILOT REPORTS LATE MISSED APPROACH AND LATE CALL TO TOWER AFTER FD GS IS DISCOVERED TO BE 'STUCK' APPROACHING MINIMUMS ON ILS IN IMC.

Narrative: CONDUCTING CAT 1 ILS APCH TO RWY 19R ATIS RPTING INDEF 100 RVR 1800; TWR RPTING RVR 5000-6000 FT. ABOUT THE TIME APCHING DECISION HT NOTED THAT GS INDICATOR ON HSI 'STUCK.' #2 ILS INDICATOR (RAW DATA) INDICATING SEVERAL DOTS HIGH. HESITATED WHILE TRYING TO SORT IT OUT. SHOULD HAVE EXECUTED IMMEDIATE MISSED APCH. BEGAN LATE CLBOUT ON MISSED APCH AND WAS LATE ON ADVISING TWR OF MISS (APPROX 1.5 MI S OF DEP END OF RWY). VECTORED AROUND FOR APCH ON RWY 19L: UNEVENTFUL APCH AND LNDG. TWR SUPVR ASKED FOR PHONE CALL. WAS CONCERNED ABOUT LATE CALL ON MISS BECAUSE TWR (LCL) DID NOT KNOW POS OF ACFT UNTIL CALL. ON FIRST INDICATION OF EQUIP MALFUNCTION SHOULD HAVE EXECUTED MISSED APCH AND NOTIFIED ATC.

Data retrieved from NASA's ASRS site as of January 2009 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.