|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : gnv|
|Altitude||msl bound lower : 2000|
msl bound upper : 2700
|Controlling Facilities||artcc : zox|
|Operator||general aviation : personal|
|Make Model Name||Any Unknown or Unlisted Aircraft Manufacturer|
|Operating Under FAR Part||Part 91|
|Flight Phase||descent : approach|
landing : missed approach
|Function||flight crew : single pilot|
|Qualification||pilot : private|
pilot : instrument
|Experience||flight time last 90 days : 24|
flight time total : 342
flight time type : 274
|Affiliation||government : faa|
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||aircraft equipment problem : critical|
altitude deviation : overshoot
|Independent Detector||other controllera|
other flight crewa
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
While en route to gnv my primary navigation radio became inoperative. I notified center of loss and that I was on backup VOR. After being cleared for the approach and passing FAF, my secondary navigation went out and I called a missed approach. During the missed approach, I was trying to correct the radio problem and failed to monitor the altimeter. I only made sure that I was climbing at an acceptable airspeed and on the approximately correct heading. When center asked about altitude, I made corrections from 2700 ft to 2000 ft. A few min later informed controller the reason for missed approach. I was able to get the #2 operation and told the controller that I would like to try another approach. If was unsuccessful I would deviation to my alternate jax for an ASR approach. During the second approach the navigation again went out. I was within 200-300 ft of breaking out of the clouds so I chose to continue the approach. I broke out off center of runway but parallel and was cleared by tower to circle and land runway 10. The chain of events that led to this situation started with the failure of my primary navigation instrument. I had little experience shooting unfamiliar approachs using a single VOR. When the second navigation failed, I felt certain that I had a distress situation, if not an emergency. I was more concerned about aircraft control, inoperative equipment, and minimum altitude for the missed approach. In retrospect this was not the proper decision. Although my primary navigation is less than 6 months old, I plan to have it checked completely and consider upgrading my second navigation to state-of-the-art equipment. This type situation could be duplicated and included in practice sessions in VFR conditions.
Original NASA ASRS Text
Title: RPTR EXPERIENCED DUAL NAV FAILURE WHILE FLYING LOC APCH, EXECUTED A MISSED APCH, AND DEVIATED FROM PUBLISHED IAP ALT ON MISSED APCH.
Narrative: WHILE ENRTE TO GNV MY PRIMARY NAV RADIO BECAME INOP. I NOTIFIED CTR OF LOSS AND THAT I WAS ON BACKUP VOR. AFTER BEING CLRED FOR THE APCH AND PASSING FAF, MY SECONDARY NAV WENT OUT AND I CALLED A MISSED APCH. DURING THE MISSED APCH, I WAS TRYING TO CORRECT THE RADIO PROB AND FAILED TO MONITOR THE ALTIMETER. I ONLY MADE SURE THAT I WAS CLBING AT AN ACCEPTABLE AIRSPD AND ON THE APPROX CORRECT HDG. WHEN CTR ASKED ABOUT ALT, I MADE CORRECTIONS FROM 2700 FT TO 2000 FT. A FEW MIN LATER INFORMED CTLR THE REASON FOR MISSED APCH. I WAS ABLE TO GET THE #2 OP AND TOLD THE CTLR THAT I WOULD LIKE TO TRY ANOTHER APCH. IF WAS UNSUCCESSFUL I WOULD DEV TO MY ALTERNATE JAX FOR AN ASR APCH. DURING THE SECOND APCH THE NAV AGAIN WENT OUT. I WAS WITHIN 200-300 FT OF BREAKING OUT OF THE CLOUDS SO I CHOSE TO CONTINUE THE APCH. I BROKE OUT OFF CTR OF RWY BUT PARALLEL AND WAS CLRED BY TWR TO CIRCLE AND LAND RWY 10. THE CHAIN OF EVENTS THAT LED TO THIS SIT STARTED WITH THE FAILURE OF MY PRIMARY NAV INST. I HAD LITTLE EXPERIENCE SHOOTING UNFAMILIAR APCHS USING A SINGLE VOR. WHEN THE SECOND NAV FAILED, I FELT CERTAIN THAT I HAD A DISTRESS SIT, IF NOT AN EMER. I WAS MORE CONCERNED ABOUT ACFT CTL, INOP EQUIP, AND MINIMUM ALT FOR THE MISSED APCH. IN RETROSPECT THIS WAS NOT THE PROPER DECISION. ALTHOUGH MY PRIMARY NAV IS LESS THAN 6 MONTHS OLD, I PLAN TO HAVE IT CHKED COMPLETELY AND CONSIDER UPGRADING MY SECOND NAV TO STATE-OF-THE-ART EQUIP. THIS TYPE SIT COULD BE DUPLICATED AND INCLUDED IN PRACTICE SESSIONS IN VFR CONDITIONS.
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.