Flight crew of an air carrier medium large transport aircraft overshot descent altitude resulting in...

Attributes
ACN	241994
Time
Date	199305
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lny airport : hnl
State Reference	HI
Altitude	msl bound lower : 9700 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute airway : hnl
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Experimental
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 140 flight time total : 7000 flight time type : 3000
ASRS Report	241994
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : instrument
ASRS Report	241995
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were given an early descent clearance by center to 'cross julle at or below 12000 ft, maintain 12000 ft.' (normal clearance is to cross julle at or below 14000 ft, maintain 10000 ft.) this clearance was revised to 'cross julle at or below 11000 ft, maintain 10000 ft.' passing 12600 ft, center asked our altitude, then gave us 240 degree heading (we were tracking 278 degree radial lny) and expedite descent. We were then given 280 degree heading and told to contact approach. First officer was flying and sank through 10000 ft to 9700 ft on level off. I told him to get back to 10000 ft immediately. At this exact time, we got an RA on TCASII to 'climb' which ceased as we leveled at 10000 ft. We sighted opposite direction traffic as I checked in with approach. Traffic was below us at 9000 ft, passed 3 mi off to right. We were never advised of traffic or the reason for an expedited descent, apparently into a potential conflict. Corrective actions: if at all possible, ATC should advise crew of reason for expedited action. Contributing factors: expedited actions may lead to excursions when crew is searching for traffic.

Original NASA ASRS Text

Title: FLC OF AN ACR MLG ACFT OVERSHOT DSCNT ALT RESULTING IN A TCASII RA.

Narrative: WE WERE GIVEN AN EARLY DSCNT CLRNC BY CTR TO 'CROSS JULLE AT OR BELOW 12000 FT, MAINTAIN 12000 FT.' (NORMAL CLRNC IS TO CROSS JULLE AT OR BELOW 14000 FT, MAINTAIN 10000 FT.) THIS CLRNC WAS REVISED TO 'CROSS JULLE AT OR BELOW 11000 FT, MAINTAIN 10000 FT.' PASSING 12600 FT, CTR ASKED OUR ALT, THEN GAVE US 240 DEG HDG (WE WERE TRACKING 278 DEG RADIAL LNY) AND EXPEDITE DSCNT. WE WERE THEN GIVEN 280 DEG HDG AND TOLD TO CONTACT APCH. FO WAS FLYING AND SANK THROUGH 10000 FT TO 9700 FT ON LEVEL OFF. I TOLD HIM TO GET BACK TO 10000 FT IMMEDIATELY. AT THIS EXACT TIME, WE GOT AN RA ON TCASII TO 'CLB' WHICH CEASED AS WE LEVELED AT 10000 FT. WE SIGHTED OPPOSITE DIRECTION TFC AS I CHKED IN WITH APCH. TFC WAS BELOW US AT 9000 FT, PASSED 3 MI OFF TO R. WE WERE NEVER ADVISED OF TFC OR THE REASON FOR AN EXPEDITED DSCNT, APPARENTLY INTO A POTENTIAL CONFLICT. CORRECTIVE ACTIONS: IF AT ALL POSSIBLE, ATC SHOULD ADVISE CREW OF REASON FOR EXPEDITED ACTION. CONTRIBUTING FACTORS: EXPEDITED ACTIONS MAY LEAD TO EXCURSIONS WHEN CREW IS SEARCHING FOR TFC.

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.

Flight crew of an air carrier medium large transport aircraft overshot descent altitude resulting in a TCASII RA.