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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Pilot of a mooney M20K-231, observed another unknown aircraft just above him during a final ILS approach to a non controled airport. He was not on flight plan or controled, but believed that it was an air carrier aircraft he had heard calling into the local FSS radio facility earlier. Near midair collision.
| Attributes | |
| ACN | 383177 |
| Time | |
| Date | 199710 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : cpr |
| State Reference | WY |
| Altitude | msl bound lower : 6000 msl bound upper : 6700 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : pit |
| Operator | general aviation : personal |
| Make Model Name | M-20 K (231) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 43 flight time total : 1725 flight time type : 473 |
| ASRS Report | 383177 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 50 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Came out of phoenix late afternoon. WX briefing earlier in day had predicted clear skies. Flight watch off phoenix after departure had predicted broken to scattered. WX was clear until after medicine bow. Cloud deck appeared below. Started listening to casper ATIS, on I think 126.15. ATIS said tower/approach closed, contact casper radio on 118.3. Called multiple times. No reply. A carrier also started calling 'casper radio' on 118.3 -- no reply. The air carrier repeated his calls to 'casper radio' multiple times as did I. Neither of us ever received any replies until much later. I repeated calls to casper radio, and started broadcasting my position and intentions, including finally that I was on the ILS. Had each time transmitted I was landing at casper. The carrier did not ever broadcast his position or intentions. I assumed, in error, he was on the ground in casper, looking for a clearance. First time air carrier announced where he was, he was above me, and I was on ILS. My errors: a) assuming air carrier was on ground, B) should have called ZDV, but ATIS said to call 118.3, C) could have asked air carrier where they were. Other suggestions, a) ATIS in casper could include phrase 'or ZDV on XXX,' B) be nice if casper radio would answer calls.
Original NASA ASRS Text
Title: PLT OF A MOONEY M20K-231, OBSERVED ANOTHER UNKNOWN ACFT JUST ABOVE HIM DURING A FINAL ILS APCH TO A NON CTLED ARPT. HE WAS NOT ON FLT PLAN OR CTLED, BUT BELIEVED THAT IT WAS AN ACR ACFT HE HAD HEARD CALLING INTO THE LCL FSS RADIO FACILITY EARLIER. NMAC.
Narrative: CAME OUT OF PHOENIX LATE AFTERNOON. WX BRIEFING EARLIER IN DAY HAD PREDICTED CLR SKIES. FLT WATCH OFF PHOENIX AFTER DEP HAD PREDICTED BROKEN TO SCATTERED. WX WAS CLR UNTIL AFTER MEDICINE BOW. CLOUD DECK APPEARED BELOW. STARTED LISTENING TO CASPER ATIS, ON I THINK 126.15. ATIS SAID TWR/APCH CLOSED, CONTACT CASPER RADIO ON 118.3. CALLED MULTIPLE TIMES. NO REPLY. A CARRIER ALSO STARTED CALLING 'CASPER RADIO' ON 118.3 -- NO REPLY. THE ACR REPEATED HIS CALLS TO 'CASPER RADIO' MULTIPLE TIMES AS DID I. NEITHER OF US EVER RECEIVED ANY REPLIES UNTIL MUCH LATER. I REPEATED CALLS TO CASPER RADIO, AND STARTED BROADCASTING MY POS AND INTENTIONS, INCLUDING FINALLY THAT I WAS ON THE ILS. HAD EACH TIME XMITTED I WAS LNDG AT CASPER. THE CARRIER DID NOT EVER BROADCAST HIS POS OR INTENTIONS. I ASSUMED, IN ERROR, HE WAS ON THE GND IN CASPER, LOOKING FOR A CLRNC. FIRST TIME ACR ANNOUNCED WHERE HE WAS, HE WAS ABOVE ME, AND I WAS ON ILS. MY ERRORS: A) ASSUMING ACR WAS ON GND, B) SHOULD HAVE CALLED ZDV, BUT ATIS SAID TO CALL 118.3, C) COULD HAVE ASKED ACR WHERE THEY WERE. OTHER SUGGESTIONS, A) ATIS IN CASPER COULD INCLUDE PHRASE 'OR ZDV ON XXX,' B) BE NICE IF CASPER RADIO WOULD ANSWER CALLS.
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.