 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier medium large transport unable to establish communication after takeoff instituted lost communication procedure.
| Attributes | |
| ACN | 90392 |
| Time | |
| Date | 198807 |
| Day | Sun |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | msl bound lower : 3000 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : las tower : las |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude climbout : initial |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4500 |
| ASRS Report | 90392 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 3500 |
| ASRS Report | 90547 |
| Events | |
| Anomaly | aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : overcame equipment problem |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
Aircraft departed runway 7 (25 optimum) due to weight restrictions. After takeoff we received no xmissions from tower or departure control, although they later said they heard and acknowledged all of our xmissions. We attempted contact on 119.9, 133.95, 127.15, our company heard us on 129.2 and we heard them. As we were in a heavy aircraft, in mountainous terrain, we flew the departure procedure and commenced a climb to 15000' MSL as per our pre-departure ATC clearance. Approximately 5 mins after takeoff we finally were able to establish contact with las departure control. No evasive action was required. I am not sure why we heard no xmissions from ATC facility, possible due to receiver failure (but company heard us immediately), or possibly due to a delay in controller response. Suggest check area of transmitter coverage east of las and request controllers respond in a timely manner.
Original NASA ASRS Text
Title: ACR MLG UNABLE TO ESTABLISH COM AFTER TKOF INSTITUTED LOST COM PROC.
Narrative: ACFT DEPARTED RWY 7 (25 OPTIMUM) DUE TO WEIGHT RESTRICTIONS. AFTER TKOF WE RECEIVED NO XMISSIONS FROM TWR OR DEP CTL, ALTHOUGH THEY LATER SAID THEY HEARD AND ACKNOWLEDGED ALL OF OUR XMISSIONS. WE ATTEMPTED CONTACT ON 119.9, 133.95, 127.15, OUR COMPANY HEARD US ON 129.2 AND WE HEARD THEM. AS WE WERE IN A HVY ACFT, IN MOUNTAINOUS TERRAIN, WE FLEW THE DEP PROC AND COMMENCED A CLB TO 15000' MSL AS PER OUR PRE-DEP ATC CLRNC. APPROX 5 MINS AFTER TKOF WE FINALLY WERE ABLE TO ESTABLISH CONTACT WITH LAS DEP CTL. NO EVASIVE ACTION WAS REQUIRED. I AM NOT SURE WHY WE HEARD NO XMISSIONS FROM ATC FAC, POSSIBLE DUE TO RECEIVER FAILURE (BUT COMPANY HEARD US IMMEDIATELY), OR POSSIBLY DUE TO A DELAY IN CTLR RESPONSE. SUGGEST CHK AREA OF XMITTER COVERAGE E OF LAS AND REQUEST CTLRS RESPOND IN A TIMELY MANNER.
Data retrieved from NASA's ASRS site as of August 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.