Potential conflict lessened in intensity by TCASII RA. PIC complains of TA given too late. First officer response was evasive action climb. Traffic sighted.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	261589
Time
Date	199401
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : sli
State Reference	CA
Altitude	msl bound lower : 9500 msl bound upper : 9500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : new
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : direct enroute airway : ont
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Twin Otter DHC-6
Operating Under FAR Part	Part 91
Flight Phase	cruise other cruise other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 10000 flight time type : 1800
ASRS Report	261589
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : clearance non adherence : far other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified
Airport	other physical facility

Narrative:

Landing my small aircraft, approximately 18 NM east kayoh intersection proceeding RNAV direct to kayoh and heading approximately 270 degrees. We just switched from ZLA to ontario approach control. Ont gave us clearance to descend from 12000 ft MSL to 8000 ft MSL. At about 10000 ft MSL descending we received a TA alert on the TCASII and an RA to climb at 9500 ft MSL. Between the TA and the RA the ont controller gave us a TA without altitude information. We sighted the high wing dehavaland at 11 O'clock approximately 1-2 NM and appearing level or slightly lower than 9500 ft MSL. I queried ont 'is that aircraft on an IFR flight plan?' ont responded 'no, he is carrying sky divers.' mixing traffic and controling authorities as in this case risks another accident. The ont (ontario approach control) controller could or should have pointed the traffic out sooner.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT LESSENED IN INTENSITY BY TCASII RA. PIC COMPLAINS OF TA GIVEN TOO LATE. FO RESPONSE WAS EVASIVE ACTION CLB. TFC SIGHTED.

Narrative: LNDG MY SMA, APPROX 18 NM E KAYOH INTXN PROCEEDING RNAV DIRECT TO KAYOH AND HDG APPROX 270 DEGS. WE JUST SWITCHED FROM ZLA TO ONTARIO APCH CTL. ONT GAVE US CLRNC TO DSND FROM 12000 FT MSL TO 8000 FT MSL. AT ABOUT 10000 FT MSL DSNDING WE RECEIVED A TA ALERT ON THE TCASII AND AN RA TO CLB AT 9500 FT MSL. BTWN THE TA AND THE RA THE ONT CTLR GAVE US A TA WITHOUT ALT INFO. WE SIGHTED THE HIGH WING DEHAVALAND AT 11 O'CLOCK APPROX 1-2 NM AND APPEARING LEVEL OR SLIGHTLY LOWER THAN 9500 FT MSL. I QUERIED ONT 'IS THAT ACFT ON AN IFR FLT PLAN?' ONT RESPONDED 'NO, HE IS CARRYING SKY DIVERS.' MIXING TFC AND CTLING AUTHORITIES AS IN THIS CASE RISKS ANOTHER ACCIDENT. THE ONT (ONTARIO APCH CTL) CTLR COULD OR SHOULD HAVE POINTED THE TFC OUT SOONER.

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.