Frequency change late delayed.

Attributes
ACN	296350
Time
Date	199502
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : las
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : initial
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : cfi pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 9000 flight time type : 1200
ASRS Report	296350
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Right after liftoff from las, we experienced a loud rapid banging noise in the cockpit. Noise was very loud and disconcerting. Tower gave us a frequency change to departure control, which we acknowledged. Due to the workload in trying to ascertain the nature of the noise, our contact with departure control was delayed about a min. We continued to sfo for an emergency landing after consulting with maintenance.

Original NASA ASRS Text

Title: FREQ CHANGE LATE DELAYED.

Narrative: RIGHT AFTER LIFTOFF FROM LAS, WE EXPERIENCED A LOUD RAPID BANGING NOISE IN THE COCKPIT. NOISE WAS VERY LOUD AND DISCONCERTING. TWR GAVE US A FREQ CHANGE TO DEP CTL, WHICH WE ACKNOWLEDGED. DUE TO THE WORKLOAD IN TRYING TO ASCERTAIN THE NATURE OF THE NOISE, OUR CONTACT WITH DEP CTL WAS DELAYED ABOUT A MIN. WE CONTINUED TO SFO FOR AN EMER LNDG AFTER CONSULTING WITH MAINT.

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.