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Near midair collision between an light transport and a small aircraft on the ILS at a non controled airport.
| Attributes | |
| ACN | 284677 |
| Time | |
| Date | 199410 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mcw |
| State Reference | IA |
| Altitude | agl bound lower : 900 agl bound upper : 900 |
| Environment | |
| Flight Conditions | Marginal |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 31 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 230 flight time total : 4400 flight time type : 500 |
| ASRS Report | 284677 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
After numerous position reports, we broke out of cloud at approximately 1200 ft AGL on GS during an ILS to runway 35 at mew. Approximately 15 seconds later, (900 AGL) both the first officer and I observed a cherokee climbing out straight toward us. We took evading action and a collision was avoided by approximately 100 ft vertical separation. The pilot of the cherokee, when questioned about his departure, indicated he had departed runway 12 and turned sbound. We were at best 300 ft below the cloud later when the cherokee passed over the top of our aircraft. I subsequently discovered the pilot had been involved in a discussion with another captain from our company earlier above the viability of 'scud-running' to his destination. He was advised against it then and should not have attempted it when he did. The pilot even requested our position twice during our approach and upon being advised we were at surff (LOM) inbound, he elected to depart directly into our path. The low overcast and poor visibility in drizzle and rain allowed for very few seconds of warning.
Original NASA ASRS Text
Title: NMAC BTWN AN LTT AND A SMA ON THE ILS AT A NON CTLED ARPT.
Narrative: AFTER NUMEROUS POS RPTS, WE BROKE OUT OF CLOUD AT APPROX 1200 FT AGL ON GS DURING AN ILS TO RWY 35 AT MEW. APPROX 15 SECONDS LATER, (900 AGL) BOTH THE FO AND I OBSERVED A CHEROKEE CLBING OUT STRAIGHT TOWARD US. WE TOOK EVADING ACTION AND A COLLISION WAS AVOIDED BY APPROX 100 FT VERT SEPARATION. THE PLT OF THE CHEROKEE, WHEN QUESTIONED ABOUT HIS DEP, INDICATED HE HAD DEPARTED RWY 12 AND TURNED SBOUND. WE WERE AT BEST 300 FT BELOW THE CLOUD LATER WHEN THE CHEROKEE PASSED OVER THE TOP OF OUR ACFT. I SUBSEQUENTLY DISCOVERED THE PLT HAD BEEN INVOLVED IN A DISCUSSION WITH ANOTHER CAPT FROM OUR COMPANY EARLIER ABOVE THE VIABILITY OF 'SCUD-RUNNING' TO HIS DEST. HE WAS ADVISED AGAINST IT THEN AND SHOULD NOT HAVE ATTEMPTED IT WHEN HE DID. THE PLT EVEN REQUESTED OUR POS TWICE DURING OUR APCH AND UPON BEING ADVISED WE WERE AT SURFF (LOM) INBOUND, HE ELECTED TO DEPART DIRECTLY INTO OUR PATH. THE LOW OVCST AND POOR VISIBILITY IN DRIZZLE AND RAIN ALLOWED FOR VERY FEW SECONDS OF WARNING.
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.