DO328 jet flight crew climbed in response to a TCASII RA during approach descent for a mooney aircra...

Attributes
ACN	549818
Time
Date	200206
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl single value : 4000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : phl.tracon
Operator	general aviation : personal
Make Model Name	Cadet Mark 10
Operating Under FAR Part	Part 91
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 100 flight time total : 4500 flight time type : 500
ASRS Report	549818
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took evasive action flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 300
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

ATC issued a clearance to descend to 4000 ft. While in the descent, ATC issued a TA for a mooney below us at 3500 ft. Both myself and the first officer began scanning the area but did not establish visual contact with the mooney. Upon leveling at 4000 ft MSL, the TCASII issued a TA and the mooney was presented to be 300 ft below us. A climbing RA was issued and I disconnected the autoplt, applied climb power and pitched to meet the 1100 FPM climb that was directed on the vsi. At 4400 ft MSL, the TCASII stated we were clear of the conflict. I reduced power and began to descend back to 4000 ft just as we were being cleared for a visual to runway 27R. Prior to being switched over to tower, I notified approach that we deviated from our assigned altitude in compliance with an RA. He asked if we had to climb to avoid the mooney and we confirmed that was the case.

Original NASA ASRS Text

Title: DO328 JET FLC CLBED IN RESPONSE TO A TCASII RA DURING APCH DSCNT FOR A MOONEY ACFT 300 FT BELOW.

Narrative: ATC ISSUED A CLRNC TO DSND TO 4000 FT. WHILE IN THE DSCNT, ATC ISSUED A TA FOR A MOONEY BELOW US AT 3500 FT. BOTH MYSELF AND THE FO BEGAN SCANNING THE AREA BUT DID NOT ESTABLISH VISUAL CONTACT WITH THE MOONEY. UPON LEVELING AT 4000 FT MSL, THE TCASII ISSUED A TA AND THE MOONEY WAS PRESENTED TO BE 300 FT BELOW US. A CLBING RA WAS ISSUED AND I DISCONNECTED THE AUTOPLT, APPLIED CLB PWR AND PITCHED TO MEET THE 1100 FPM CLB THAT WAS DIRECTED ON THE VSI. AT 4400 FT MSL, THE TCASII STATED WE WERE CLR OF THE CONFLICT. I REDUCED PWR AND BEGAN TO DSND BACK TO 4000 FT JUST AS WE WERE BEING CLRED FOR A VISUAL TO RWY 27R. PRIOR TO BEING SWITCHED OVER TO TWR, I NOTIFIED APCH THAT WE DEVIATED FROM OUR ASSIGNED ALT IN COMPLIANCE WITH AN RA. HE ASKED IF WE HAD TO CLB TO AVOID THE MOONEY AND WE CONFIRMED THAT WAS THE CASE.

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.

DO328 jet flight crew climbed in response to a TCASII RA during approach descent for a mooney aircraft 300 ft below.