Lost communication procedure used after loss of radio contact. Potential conflict ensues.

Attributes
ACN	235625
Time
Date	199303
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : fll
State Reference	FL
Altitude	msl bound lower : 2500 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : fll tower : fll
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude climbout : takeoff cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 210 flight time total : 7000 flight time type : 840
ASRS Report	235625
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Experienced lost communication after takeoff. Maintained 3000 ft assigned and runway heading. Attempted to troubleshoot problem. After 3-4 mins, discovered problem and contacted departure control. They advised traffic at 12 O'clock, 2 mi, 3000 ft. TCASII confirmed. Disconnected autoplt and descended to 2500 to avoid other aircraft, which we now had visually. TCASII did a great job! If we had been IMC, it (TCASII) would have avoided a midair or near miss. TCASII and TCASII training proved very valuable.

Original NASA ASRS Text

Title: LOST COM PROC USED AFTER LOSS OF RADIO CONTACT. POTENTIAL CONFLICT ENSUES.

Narrative: EXPERIENCED LOST COM AFTER TKOF. MAINTAINED 3000 FT ASSIGNED AND RWY HDG. ATTEMPTED TO TROUBLESHOOT PROB. AFTER 3-4 MINS, DISCOVERED PROB AND CONTACTED DEP CTL. THEY ADVISED TFC AT 12 O'CLOCK, 2 MI, 3000 FT. TCASII CONFIRMED. DISCONNECTED AUTOPLT AND DSNDED TO 2500 TO AVOID OTHER ACFT, WHICH WE NOW HAD VISUALLY. TCASII DID A GREAT JOB! IF WE HAD BEEN IMC, IT (TCASII) WOULD HAVE AVOIDED A MIDAIR OR NEAR MISS. TCASII AND TCASII TRAINING PROVED VERY VALUABLE.

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.