# NTSB CHI94LA186: Hawker Siddeley DH-125-3A, N900CD, Waukegan, IL, May 30, 1994 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 30, 1994, 18:42 local (23:42 UTC) - Place: Waukegan, IL - Coordinates: 42.400619, -87.850151 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.4006&lon=-87.8502&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 14, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 9555 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI94LA186 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9555/pdf - Page: https://openairdocs.org/ntsb/CHI94LA186 ## Probable cause was the pilot-in-command disregarding the location of the flight manifest container in the cockpit. Factor's associated with the accident were a jammed control column and inadequate procedures for the use and storage of the flight manifest container on the part of company management. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - flt control syst,yoke/control stick - jammed (cause) - flight control,elevator - movement restricted - miscellaneous equipment - disregarded, pilot in command (cause) - procedures/directives - inadequate, company/operator management (contributing factor) - remedial action - attempted, pilot in command ## Analysis THE CORPORATE JET'S SINK RATE INCREASED DURING SHORT FINAL APPROACH. THE C0PILOT APPLIED ELEVATOR BACK PRESSURE AND NOSE UP TRIM. THE SINK RATE CONTINUED TO INCREASE. THE CAPTAIN OBSERVED THE COPILOT'S EFFORTS AND BEGAN APPLYING BACK PRESSURE ON HIS CONTROL YOKE. THROUGH COMBINED EFFORTS OF BOTH PILOTS THEY WERE ABLE TO INCREASE THE PITCH ENOUGH THAT THE AIRPLANE TOUCHED DOWN ON THE MAIN GEAR FIRST. HOWEVER, THE TOUCHDOWN WAS HARD. THE ON-SCENE INVESTIGATION REVEALED THAT A TRIP MANIFEST CONTAINER WAS LODGED BETWEEN THE COPILOT'S CONTROL YOKE COLUMN AND SEAT FRAME. THE PILOTS STATED THE CONTAINER IS REQUIRED TO BE CARRIED IN THE COCKPIT DURING FLIGHTS. BOTH PILOTS SAID THERE IS NO DESIGNATED SPACE IN THE COCKPIT TO RETAIN THE CONTAINER. ## Factual narrative On May 30, 1994, at 1842 central daylight time (CDT), a Hawker- Siddeley DH-125-3A, N900CD, registered to D.B. Aviation/Ditka Corporation, of Waukegan, Illinois, and piloted by an airline transport and commercially rated crew, was substantially damaged during a hard landing on runway 23 (6,000'X 150' dry concrete) at the Waukegan Regional Airport, Waukegan, Illinois. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 positioning flight was not operating on a flight plan. The pilots reported no injuries. The flight departed Wheeling, Illinois, at 1835 CDT. According to the captain's written statement attached to NTSB Form, 6120.1/2, the copilot was flying the approach which was normal until about 200 feet above the ground. He stated the sink rate then increased and he called out, "descending below vasi." Elevator back pressure was increased with little or no effect. Trim to increase pitch-up was also applied. The callout "pull up" was then made. At this time the control yoke was pulled back with great force by both pilots. A hard landing followed. During the flight crew's post flight inspection of the airplane a trip manifest container was found wedged between the copilot's seat and control yoke column. The container was "...severely bent", according to the captain's written statement. Both pilots were asked where the trip manifest container is normally stored. They responded that there is no storage space specifically designated in the cockpit for the container. According to the captain, the container is usually stored against the cockpit's right sidewall. Both pilots said the container has always been stored in that position since they have been with the company. They said the company required that the container be kept in the cockpit. The copilot stated the container's size was 9" X 12" X 1". ## Aircraft - Registration: [N900CD](https://openairdocs.org/deregistered/N900CD-1999-07-23), registration cancelled 1999-07-23, S/N 25111 (OpenAirDocs) - Reported make and model: Hawker Siddeley DH-125-3A - Registry model: [Hawker Siddeley DH.125-3A](https://openairdocs.org/model/hawker-siddeley-dh-125-3a) (registry code 4230126) (OpenAirDocs) - Category: Airplane - Serial number: 111 - Engines: ROLLS-ROYCE VIPER 52201 turbo jet - Damage: Substantial damage - Flight: Positioning, Part 91 - Operator: D.B. Aviation/Ditka Corp. - Registered owner: D.B. Aviation/Ditka Corp. - Airworthiness certificate: Standard, Transport - Last inspection: AAIP, May 24, 1994, 7 hours before - Departed: PWK, WHEELING, IL - Airport: UGN, Waukegan Regional Airport, runway 23, 6,000 × 150 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 43; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, unknown; seat: left; flight hours: 10,000 total, 950 in this make and model, 8,800 as pilot in command, 81 in the last 90 days, 38 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 14 knots - Visibility: 40 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 37 °F - Altimeter: 29.00 inHg - Observed at: UGN, 1 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19940530040609A](https://openairdocs.org/incident/19940530040609A), May 30, 1994: Hwksly DH1253A, Chicago/Waukega, IL, Substantial damage. High sink rate on final both pilots forced yoke back. Landed hard. Trip manifest pad wedged between yoke seat frame From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.