<< >> NASA ASRS Report 406590, June 1998

A landing clearance acknowledgment was not received by buf tower from the MD80 flight crew. On taxi in controller queried the crew as to why not.

Attributes
ACN	406590
Time
Date	199806
Day	Sat
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : buf
State Reference	NY
Altitude	agl bound lower : 0 agl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : buf
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 240 flight time total : 26000 flight time type : 1200
ASRS Report	406590
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	other pilot : instrument pilot : flight engineer pilot : atp pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 18000 flight time type : 345
ASRS Report	406941
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

After receiving landing clearance from buffalo tower, acknowledgment was made. During taxi in tower wanted to know why we did not acknowledge landing clearance. We later found out microphone was working intermittently. Supplemental information from acn 406941: captain acknowledged clearance. Tower again cleared us to land and captain again acknowledged clearance. Tower questioned why we did not acknowledge clearance. Discovered microphone transmitter was stuck.

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Original NASA ASRS Text

Title: A LNDG CLRNC ACKNOWLEDGMENT WAS NOT RECEIVED BY BUF TWR FROM THE MD80 FLC. ON TAXI IN CTLR QUERIED THE CREW AS TO WHY NOT.

Narrative: AFTER RECEIVING LNDG CLRNC FROM BUFFALO TWR, ACKNOWLEDGMENT WAS MADE. DURING TAXI IN TWR WANTED TO KNOW WHY WE DID NOT ACKNOWLEDGE LNDG CLRNC. WE LATER FOUND OUT MIKE WAS WORKING INTERMITTENTLY. SUPPLEMENTAL INFO FROM ACN 406941: CAPT ACKNOWLEDGED CLRNC. TWR AGAIN CLRED US TO LAND AND CAPT AGAIN ACKNOWLEDGED CLRNC. TWR QUESTIONED WHY WE DID NOT ACKNOWLEDGE CLRNC. DISCOVERED MIKE XMITTER WAS STUCK.

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.