<< >> NASA ASRS Report 400720, April 1998

A DC9-30 flight crew fails to make their crossing restr at awsum on the gsh 3 arrival into mdw. Aircraft crosses fix at 15000 ft versus 10000 ft as chart says to expect.

Attributes
ACN	400720
Time
Date	199804
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : gsh airport : mdw
State Reference	IN
Altitude	msl bound lower : 10000 msl bound upper : 15000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute airway : zau
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 70 flight time total : 13000 flight time type : 5500
ASRS Report	400720
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Flight was given the goshen arrival crossing restr of awsum intersection at 10000 ft MSL en route to mdw. We were at FL200 approximately 10 mi west of gsh when ZAU asked if we were going to have a problem making awsum at 10000 ft. At this point I realized I had misread the arrival plate and began an expedited descent to 10000 ft. We leveled at 10000 ft at approximately the gsh 270 degree/32 DME, missing the assigned altitude restr of 10000 ft at the gsh 270 degree radial/25 DME. ZAU stated there were no traffic conflicts and there wasn't a problem. Reviewing this event I realized that I had misread the arrival plate and thought awsum was the gsh 270 degree/44 DME. In fact awsum is 44 DME from chicago heights VOR (part of the arrival). Greater scrutiny of the arrival procedure would have eliminated this problem. I have incorporated into my habit patterns physically putting the arrival plate on the yoke to enable a better view of the procedure in order to avoid these problems in the future.

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Original NASA ASRS Text

Title: A DC9-30 FLC FAILS TO MAKE THEIR XING RESTR AT AWSUM ON THE GSH 3 ARR INTO MDW. ACFT CROSSES FIX AT 15000 FT VERSUS 10000 FT AS CHART SAYS TO EXPECT.

Narrative: FLT WAS GIVEN THE GOSHEN ARR XING RESTR OF AWSUM INTXN AT 10000 FT MSL ENRTE TO MDW. WE WERE AT FL200 APPROX 10 MI W OF GSH WHEN ZAU ASKED IF WE WERE GOING TO HAVE A PROB MAKING AWSUM AT 10000 FT. AT THIS POINT I REALIZED I HAD MISREAD THE ARR PLATE AND BEGAN AN EXPEDITED DSCNT TO 10000 FT. WE LEVELED AT 10000 FT AT APPROX THE GSH 270 DEG/32 DME, MISSING THE ASSIGNED ALT RESTR OF 10000 FT AT THE GSH 270 DEG RADIAL/25 DME. ZAU STATED THERE WERE NO TFC CONFLICTS AND THERE WASN'T A PROB. REVIEWING THIS EVENT I REALIZED THAT I HAD MISREAD THE ARR PLATE AND THOUGHT AWSUM WAS THE GSH 270 DEG/44 DME. IN FACT AWSUM IS 44 DME FROM CHICAGO HEIGHTS VOR (PART OF THE ARR). GREATER SCRUTINY OF THE ARR PROC WOULD HAVE ELIMINATED THIS PROB. I HAVE INCORPORATED INTO MY HABIT PATTERNS PHYSICALLY PUTTING THE ARR PLATE ON THE YOKE TO ENABLE A BETTER VIEW OF THE PROC IN ORDER TO AVOID THESE PROBS IN THE FUTURE.

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.