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Flight crew of large transport flies with 2 inoperative VOR receivers believing ground transmitters to be out of service.
| Attributes | |
| ACN | 118984 |
| Time | |
| Date | 198907 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : stl |
| State Reference | MO |
| Altitude | msl bound lower : 15000 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors enroute airway : zkc |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 35 flight time total : 3900 flight time type : 750 |
| ASRS Report | 118984 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Departed hub for stl. First scheduled VORTAC inoperative. Requested and received radar vectors for stl. After receiving DME from stl, radar vectors given for approach. Had not received azimuth information from stl. Toy VORTAC inoperative. Was not concerned with lack of azimuth information because of radar vectors and having switched to localizer frequency. ILS never came up; landed visually. Once on ground, DME information continued to be available. No azimuth information, but decided it was due to location on airport remote parking close to hangars. Departed stl and once airborne could not get azimuth information from stl. Immediately reported lack of signal to center. They reported other aircraft were getting a usable signal. Reported both VOR receivers inoperative and received radar vectors to destination and landed visually. At destination, mechanic inspected receivers and found they had not been secured in radio rack and not connected. Crew was not expecting azimuth information because of inoperative navaids. Did not try to tune and identify other navaids along course when on radar vectors. Occasionally, first aircraft into stl does not receive ILS because it hasn't been turned on yet (according to crew). Did not suspect a problem existed until after departure from stl. Should have been more suspicious and conducted vot test. Probably would have thought to conduct test if had not been up all night. Possible influence last leg of trip before sale of airline.
Original NASA ASRS Text
Title: FLT CREW OF LGT FLIES WITH 2 INOPERATIVE VOR RECEIVERS BELIEVING GND TRANSMITTERS TO BE OUT OF SERVICE.
Narrative: DEPARTED HUB FOR STL. FIRST SCHEDULED VORTAC INOP. REQUESTED AND RECEIVED RADAR VECTORS FOR STL. AFTER RECEIVING DME FROM STL, RADAR VECTORS GIVEN FOR APCH. HAD NOT RECEIVED AZIMUTH INFO FROM STL. TOY VORTAC INOP. WAS NOT CONCERNED WITH LACK OF AZIMUTH INFO BECAUSE OF RADAR VECTORS AND HAVING SWITCHED TO LOC FREQ. ILS NEVER CAME UP; LANDED VISUALLY. ONCE ON GND, DME INFO CONTINUED TO BE AVAILABLE. NO AZIMUTH INFO, BUT DECIDED IT WAS DUE TO LOCATION ON ARPT REMOTE PARKING CLOSE TO HANGARS. DEPARTED STL AND ONCE AIRBORNE COULD NOT GET AZIMUTH INFO FROM STL. IMMEDIATELY RPTED LACK OF SIGNAL TO CENTER. THEY RPTED OTHER ACFT WERE GETTING A USABLE SIGNAL. RPTED BOTH VOR RECEIVERS INOP AND RECEIVED RADAR VECTORS TO DEST AND LANDED VISUALLY. AT DEST, MECH INSPECTED RECEIVERS AND FOUND THEY HAD NOT BEEN SECURED IN RADIO RACK AND NOT CONNECTED. CREW WAS NOT EXPECTING AZIMUTH INFO BECAUSE OF INOP NAVAIDS. DID NOT TRY TO TUNE AND IDENT OTHER NAVAIDS ALONG COURSE WHEN ON RADAR VECTORS. OCCASIONALLY, FIRST ACFT INTO STL DOES NOT RECEIVE ILS BECAUSE IT HASN'T BEEN TURNED ON YET (ACCORDING TO CREW). DID NOT SUSPECT A PROB EXISTED UNTIL AFTER DEP FROM STL. SHOULD HAVE BEEN MORE SUSPICIOUS AND CONDUCTED VOT TEST. PROBABLY WOULD HAVE THOUGHT TO CONDUCT TEST IF HAD NOT BEEN UP ALL NIGHT. POSSIBLE INFLUENCE LAST LEG OF TRIP BEFORE SALE OF AIRLINE.
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.