 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Flight crew of a DC9-40 stopped climb in response to a TCASII in order to assure separation with another aircraft (saab commuter) to which ATC instructed to maintain visual separation when climbing through the saab's altitude. Near midair collision occurred when the reporter passed directly under the saab.
| Attributes | |
| ACN | 397489 |
| Time | |
| Date | 199803 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ctr |
| State Reference | MA |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 40 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute airway : zbw enroute other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Saab-Scania Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 14000 flight time type : 8500 |
| ASRS Report | 397489 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
In the climb out of pvd, ATC was ZBW 133.42. We were put on a heading of 320 degrees with a climb to 16000 ft. While still in the climb, ATC called 'traffic 11 O'clock position at 17000 ft, an mdt Y,' and we called 'traffic in sight.' to this he called 'maintain visual separation, cleared to FL230' to which we replied 'roger.' at about 16300 ft, we got a TA, traffic 11 O'clock position and 3 mi. Shortly after this, we said, 'we're going to maintain 16000 ft to which ATC replied 'roger.' in the transition from a climb to a descent, we passed 400 ft directly under the mdt Y commuter (a saab, I think) after we got a 'descend' RA. The mdt Y also called out a climb, as he had gotten an RA also. The first officer was flying the airplane and was the first to spot the intruder and also the first to suggest we stop the climb. However, as a new first officer (2 months experience, DC9) was slow to pitch the airplane over.
Original NASA ASRS Text
Title: FLC OF A DC9-40 STOPPED CLB IN RESPONSE TO A TCASII IN ORDER TO ASSURE SEPARATION WITH ANOTHER ACFT (SAAB COMMUTER) TO WHICH ATC INSTRUCTED TO MAINTAIN VISUAL SEPARATION WHEN CLBING THROUGH THE SAAB'S ALT. NMAC OCCURRED WHEN THE RPTR PASSED DIRECTLY UNDER THE SAAB.
Narrative: IN THE CLB OUT OF PVD, ATC WAS ZBW 133.42. WE WERE PUT ON A HDG OF 320 DEGS WITH A CLB TO 16000 FT. WHILE STILL IN THE CLB, ATC CALLED 'TFC 11 O'CLOCK POS AT 17000 FT, AN MDT Y,' AND WE CALLED 'TFC IN SIGHT.' TO THIS HE CALLED 'MAINTAIN VISUAL SEPARATION, CLRED TO FL230' TO WHICH WE REPLIED 'ROGER.' AT ABOUT 16300 FT, WE GOT A TA, TFC 11 O'CLOCK POS AND 3 MI. SHORTLY AFTER THIS, WE SAID, 'WE'RE GOING TO MAINTAIN 16000 FT TO WHICH ATC REPLIED 'ROGER.' IN THE TRANSITION FROM A CLB TO A DSCNT, WE PASSED 400 FT DIRECTLY UNDER THE MDT Y COMMUTER (A SAAB, I THINK) AFTER WE GOT A 'DSND' RA. THE MDT Y ALSO CALLED OUT A CLB, AS HE HAD GOTTEN AN RA ALSO. THE FO WAS FLYING THE AIRPLANE AND WAS THE FIRST TO SPOT THE INTRUDER AND ALSO THE FIRST TO SUGGEST WE STOP THE CLB. HOWEVER, AS A NEW FO (2 MONTHS EXPERIENCE, DC9) WAS SLOW TO PITCH THE AIRPLANE OVER.
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.