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B737-300 was required to take evasive action to avoid a high descent rate jumper aircraft in ZAU class east.
| Attributes | |
| ACN | 525315 |
| Time | |
| Date | 200109 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : jot.vortac |
| State Reference | IL |
| Altitude | msl single value : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Twin Otter DHC-6 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 15000 flight time type : 9000 |
| ASRS Report | 525315 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Experience | flight time last 90 days : 130 flight time total : 7800 flight time type : 130 |
| ASRS Report | 525220 |
| Events | |
| Anomaly | conflict : airborne critical inflight encounter : skydivers non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : separated traffic controller : issued alert flight crew : took evasive action none taken : detected after the fact other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 500 vertical : 100 |
| Supplementary | |
| Problem Areas | FAA Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
ZAU advised us of parachute jumping in progress 10 O'clock at XA00. I noticed a TA at 3 mi and closing and descending at 1100 ft. As we looked for traffic we received a RA to 'climb now' I disengaged automatic pilot looked left, saw a twin otter in a steep descending right turn. I turned right 30 degree bank and climbed 300 ft to avoid traffic. I asked ATC if they were in contact with twin otter. She stated they had communicated when he was climbing to 14500 to drop. She cleared us to 6000 ft and direct back to jot and handed us off to chicago approach. I advised her it was very close. I estimate less than 100 ft vertical and 500 ft horizontal. We need to be vectored away from this area. Sky diving in chicago is an accident waiting to happen.
Original NASA ASRS Text
Title: B737-300 WAS REQUIRED TO TAKE EVASIVE ACTION TO AVOID A HIGH DESCENT RATE JUMPER ACFT IN ZAU CLASS E.
Narrative: ZAU ADVISED US OF PARACHUTE JUMPING IN PROGRESS 10 O'CLOCK AT XA00. I NOTICED A TA AT 3 MI AND CLOSING AND DESCENDING AT 1100 FT. AS WE LOOKED FOR TFC WE RECEIVED A RA TO 'CLIMB NOW' I DISENGAGED AUTO PLT LOOKED LEFT, SAW A TWIN OTTER IN A STEEP DESCENDING RIGHT TURN. I TURNED RIGHT 30 DEG BANK AND CLIMBED 300 FT TO AVOID TFC. I ASKED ATC IF THEY WERE IN CONTACT WITH TWIN OTTER. SHE STATED THEY HAD COMMUNICATED WHEN HE WAS CLBING TO 14500 TO DROP. SHE CLEARED US TO 6000 FT AND DIRECT BACK TO JOT AND HANDED US OFF TO CHICAGO APCH. I ADVISED HER IT WAS VERY CLOSE. I ESTIMATE LESS THAN 100 FT VERTICAL AND 500 FT HORIZONTAL. WE NEED TO BE VECTORED AWAY FROM THIS AREA. SKY DIVING IN CHICAGO IS AN ACCIDENT WAITING TO HAPPEN.
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.