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A climbing B737-300 slows its climb rate when responding to a TCASII TA-RA with a twin otter skydive aircraft in sight, co-altitude, 1 mi away off their prado SID departure route on frequency with sct, ca.
| Attributes | |
| ACN | 508327 |
| Time | |
| Date | 200104 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Twin Otter DHC-6 |
| Operating Under FAR Part | Part 91 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 265 |
| ASRS Report | 508328 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 225 |
| ASRS Report | 508327 |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : skydivers non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other flight crewa other other : atc ctlr 3 |
| Resolutory Action | controller : issued advisory flight crew : took precautionary avoidance action |
| Consequence | other |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Problem Areas | Chart Or Publication Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | Airspace Structure |
Narrative:
Departure flight ont-bna. Cleared prado 5 trm af. Climbing on prado 5 trm east of nikkl intersection, cleared to either 14000 ft or FL190. Received a TA less than 10 NM approximately 11 - 11:30 O'clock position climbing through 11000-12000 ft. Reduced climb (first officer flying). Observed a twin otter doing left circling turns. Socal issued a TA. We acknowledged aircraft in sight. The parachute jumping aircraft was less than 1 mi off departure SID. Was handed off to ZLA. They gave us a phone number for ZLA. Supplemental information from acn 508328 revealed the following information: received a TCASII TA then RA. Reduced climb until visual with VFR twin otter. Otter passed approximately 1 mi co-altitude from us.
Original NASA ASRS Text
Title: A CLBING B737-300 SLOWS ITS CLB RATE WHEN RESPONDING TO A TCASII TA-RA WITH A TWIN OTTER SKYDIVE ACFT IN SIGHT, CO-ALT, 1 MI AWAY OFF THEIR PRADO SID DEP RTE ON FREQ WITH SCT, CA.
Narrative: DEP FLT ONT-BNA. CLRED PRADO 5 TRM AF. CLBING ON PRADO 5 TRM E OF NIKKL INTXN, CLRED TO EITHER 14000 FT OR FL190. RECEIVED A TA LESS THAN 10 NM APPROX 11 - 11:30 O'CLOCK POS CLBING THROUGH 11000-12000 FT. REDUCED CLB (FO FLYING). OBSERVED A TWIN OTTER DOING L CIRCLING TURNS. SOCAL ISSUED A TA. WE ACKNOWLEDGED ACFT IN SIGHT. THE PARACHUTE JUMPING ACFT WAS LESS THAN 1 MI OFF DEP SID. WAS HANDED OFF TO ZLA. THEY GAVE US A PHONE NUMBER FOR ZLA. SUPPLEMENTAL INFO FROM ACN 508328 REVEALED THE FOLLOWING INFO: RECEIVED A TCASII TA THEN RA. REDUCED CLB UNTIL VISUAL WITH VFR TWIN OTTER. OTTER PASSED APPROX 1 MI CO-ALT FROM US.
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.