 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of medium large transport responded to a TCASII RA by turning and then observed another aircraft descending out of an overcast.
| Attributes | |
| ACN | 283258 |
| Time | |
| Date | 199406 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : gmn |
| State Reference | CA |
| Altitude | msl bound lower : 13000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : jan |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zla |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | PA-31T-1 Cheyenne I |
| Operating Under FAR Part | other : unknown |
| Flight Phase | descent other |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 15000 flight time type : 4000 |
| ASRS Report | 283258 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : vfr in imc non adherence : far other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 2000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During climb ATC said maintain 14000 ft, traffic 12 O'clock 12 mi, 727 descending to 15000 ft. Approaching 13000 ft TCASII said 'climb, crossing climb.' indicator showed target 12 O'clock a little more than 2 mi, 1000 ft above and descending. Thinking this was the 727 I elected to reduce the climb rate expecting the RA to cancel. We were slightly below a broken layer. The TCASII target was slightly right of the nose so I started a left turn. A twin turbo propeller (cheyenne?) popped out of the clouds, passed about 1/2 mi off our right side, at our altitude. ATC never said a word. I have read of similar sits, ie, 2 aircraft 1 climbing, 1 descending, where TCASII RA caused both to perform altitude busts. That's why I elected to reduce the climb rather than increase it.
Original NASA ASRS Text
Title: FLC OF MLG RESPONDED TO A TCASII RA BY TURNING AND THEN OBSERVED ANOTHER ACFT DSNDING OUT OF AN OVCST.
Narrative: DURING CLB ATC SAID MAINTAIN 14000 FT, TFC 12 O'CLOCK 12 MI, 727 DSNDING TO 15000 FT. APCHING 13000 FT TCASII SAID 'CLB, XING CLB.' INDICATOR SHOWED TARGET 12 O'CLOCK A LITTLE MORE THAN 2 MI, 1000 FT ABOVE AND DSNDING. THINKING THIS WAS THE 727 I ELECTED TO REDUCE THE CLB RATE EXPECTING THE RA TO CANCEL. WE WERE SLIGHTLY BELOW A BROKEN LAYER. THE TCASII TARGET WAS SLIGHTLY R OF THE NOSE SO I STARTED A L TURN. A TWIN TURBO PROP (CHEYENNE?) POPPED OUT OF THE CLOUDS, PASSED ABOUT 1/2 MI OFF OUR R SIDE, AT OUR ALT. ATC NEVER SAID A WORD. I HAVE READ OF SIMILAR SITS, IE, 2 ACFT 1 CLBING, 1 DSNDING, WHERE TCASII RA CAUSED BOTH TO PERFORM ALT BUSTS. THAT'S WHY I ELECTED TO REDUCE THE CLB RATHER THAN INCREASE IT.
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.