Accident Details
Probable Cause and Findings
The pilot's descent below minimum descent altitude while on a nonprecision approach. A contributing factor was a low ceiling.
Aircraft Information
Registered Owner (Historical)
Analysis
HISTORY OF FLIGHT
On February 8, 2007, about 0225 mountain standard time, a Cessna 208B, N1116Y, operated by Suburban Air Freight Inc., sustained substantial damage on impact with a building and terrain during a non-precision approach to runway 12 at the Alliance Municipal Airport (AIA), near Alliance, Nebraska. The non-scheduled domestic cargo flight was operating under 14 CFR Part 135. Night instrument meteorological conditions prevailed at the time of the accident. An instrument flight rules (IFR) flight plan was on file and was activated. The commercial pilot sustained serious injuries and was hospitalized. The flight originated from Eppley Airfield (OMA), near Omaha, Nebraska, about 2345, and was dispatched to the Western Nebraska Regional Airport/William B. Heilig Field (BFF), near Scottsbluff, Nebraska.
The operator's accident report, in part, stated:
Scheduled U.S. Mail route operating AIA - LBF [North Platte,
Nebraska] - OMA, OMA - AIA. Due to low IFR conditions and
preceding night's aircraft diverting to, and remaining at CDR,
(Chardon, Nebraska), and being unable to position into AIA for the
evening departure, decision was made to leave the first [airplane] at
CDR overnight, and simply fly a [second airplane] from OMA - BFF
where [weather] was suitable for ILS [instrument landing system]
approach. Only non-precision approaches, with higher minimums,
are available at AIA. Thus, the accident [airplane] was dispatched
to take mail directly to BFF, which has precision approaches (ILS),
and the U.S. Mail truck was to meet the aircraft at BFF. That is a
normal procedure for occasions when AIA is below non-precision
landing conditions. All scheduled flights operate on "canned" flight
plans which are on file. ... The flight from OMA to either BFF or
AIA proceeds along the identical route until west of North Platte,
Nebraska. ... The change is typically only requested after handoff
from [Minneapolis] Center to [Denver] Center, west of North Platte. ...
Since the direct route from OMA - BFF passes literally over, or
almost over, the procedure turn for the AIA approach procedures,
there is always the option for a pilot to check weather at AIA, and if
it has unexpectedly improved so as to allow landing at AIA, certainly,
then he may land. However, in this case, the mission was not to go to
AIA, land, and remain for the next evening's return, but rather to simply
proceed to BFF, execute the precision approach, drop off the mail, and
return to OMA empty immediately.
An excerpt from a Federal Aviation Administration's (FAA) Air Route Traffic Control Center (ARTCC) transcript follows:
Agencies Making Transmissions Abbreviations
Denver ARTCC, Sector 35R Radar Controller ZDV35R
Suburban Air Freight, INC. (Omaha, NE) SUB22
...
0846:46 ZDV35R sub air two two denver center
0846:52 SUB22 denver center sub air two two level eight thousand
0846:55 ZDV35R sub air two two denver center roger the uh alliance
altimeter is three zero one seven and do you have the uh
alliance weather yet
0847:10 SUB22 three zero one seven sub air two two uh we are
requesting the uh v o r runway one two
0847:18 ZDV35R sub air two two roger
0848:09 ZDV35R sub air two two do you have the uh weather and notam
information for alliance
0849:17 SUB22 sub air two two i have the uh alliance awos and notams
0849:22 ZDV35R sub air two two roger
0854:15 SUB22 denver center sub two two request
0854:17 ZDV35R sub air two two go ahead
0854:20 SUB22 roger sub air two two would like to uh uh amend my uh
request for the uh v o r runway three zero at alliance
and uh in the event uh i have to go missed approach i'll
be uh planning to uh head over to scottsbluff
0854:36 ZDV35R sub air two two roger maintain seven thousand until
alliance v o r outbound cleared for v o r runway three
zero approach to the alliance airport
0854:48 SUB22 sub air two two departing eight for seven thousand
maintaining seven thousand until established cleared v o r
runway three zero alliance thank you
0857:11 SUB22 sub air two two copies all switching to advisory and i'll
close out my flight plan with columbus radio or i'll contact
you later if i have to uh divert to Scottsbluff
0857:21 ZDV35R sub air two two roger
0857:57 ZDV35R sub air two two radar service terminated change to
advisory frequency approved report your uh arrival with
columbus radio or you can report back to me if you uh
have to go missed approach there
0908:41 SUB22 denver center sub air two two request
0908:52 ZDV35R alpine or correction uh sub air two two go ahead
0908:56 SUB22 (unintelligible) sir sub air two two looks like i'm gonna
have to uh flr the v o r runway one two after all request
uh v o r runway one two at alliance
0909:08 ZDV35R sub air two two roger uh cleared for v o r runway one
two approach to the alliance airport maintain seven
thousand until established on a published segment of the
approach
0909:20 SUB22 sub air two two maintaining seven thousand until
established cleared v o r runway one to alliance thank
you sir- - - and uh switching back to advisory
0909:29 ZDV35R sub air two two roger change to advisory frequency
approved
0909:34 SUB22 sub air two two
A witness, who was a train engineer in a standing locomotive about a quarter mile from the impact site, reported that he felt a shock wave against his locomotive and thought it was impacted by something. He went out to inspect the locomotive. The train had collected a coating of ice and the weather was foggy according to the engineer. He stated that he saw a leaning power pole across the roadway and saw steam rising from the ditch across the roadway. He went to investigate, saw the airplane, and called 911.
FAA inspectors interviewed the pilot and he reported that he did not recall the accident.
PERSONNEL INFORMATION
According to FAA records, the pilot was issued a commercial pilot certificate with an airplane multiengine land limited to center thrust and instrument airplane ratings on October 25, 1977, based on military competence provisions allowed under 14 CFR Part 61.73 Military Pilots or Former Military Pilots: Special Rules. On December 14, 1977, he added an airplane single-engine land rating to his commercial certificate following a check ride in a Cessna 172. On August 25, 1978, he was reissued his commercial certificate without the center thrust limitation based on his military competence in the KC-135A airplane. On June 22, 1982, he was issued a type rating in the Boeing 707 and 720 airplanes based on his military competence in the KC-135A airplane. On August 22, 1982, he was issued an airplane single-engine certified flight instructor certificate following a check ride in a Piper PA-28R-200. On June 19, 1989, he was issued a type rating in the McDonnell Douglas DC-10 based on his military competence in a KC-10A airplane.
The pilot's last medical examination was completed on July 10, 2006, and the pilot was issued a second-class medical certificate with a limitation to wear corrective lenses.
According to the operator's report, the pilot reported a total flight time of 4,863 hours. The operator reported that the pilot had flown 523 hours in the Cessna 208. The operator reported that the pilot had flown 203 hours during the last 90 days and 64 hours during the last 30 days.
On October 2, 2006, the pilot attended and completed the airplane manufacturer's winter operations training seminar. The pilot attended recurrent ground training for the Cessna 208 aircraft on January 17, 2007. The pilot's last FAA Airman Competency/Proficiency Check was completed on January 18, 2007, and he was approved for 14 CFR Part 135 pilot-in-command operations in the Cessna 208.
AIRCRAFT INFORMATION
N1116Y, a Cessna 208B, Caravan, serial number 208B0368, was a single-engine, turbo-prop, high-wing airplane, equipped with fixed tricycle landing gear. The fuselage and empennage are of an all-metal semimonocoque design. The wings are externally braced and have two integral fuel tanks. The accident airplane was configured for flight into known icing conditions and to carry cargo. The airplane was equipped with two cockpit seats. The Cessna 208B had its certified maximum takeoff weight increased by supplemental type certificate SA00188SE to 8,950 lbs. A 675-horsepower Pratt & Whitney Canada PT6A-114A, serial number PCE-19241, powered the airplane. The propeller was an electrically heated three-bladed McCauley 3GFR34C703-B model with hub serial number 952444.
The airplane was equipped with distance measuring equipment (DME) and was not equipped with global positioning system (GPS) navigation equipment.
A Radio Magnetic Indicator (RMI) was installed. The RMI display combined three navigation data points on one indicator. The data points were the current aircraft heading and the magnetic headings to VHF Omnidirectional Range (VOR) and Non-Directional Beacon (NDB) stations, which were shown by the RMI's twin needles. Either needle could be switched to show VOR or NDB data in reference to the frequency that the pilot had selected in the navigation/communication radio or NDB receiver.
The airplane was equipped with a panel mounted KI 525A Horizontal Situation Indicator (HSI) which showed standard Directional Gyro and Course Deviation Indicator (CDI) information, slaved heading, and VOR, Localizer, and Glideslope information in one display. The HSI indicator incorporated a Course Select Knob that rotated the course pointer to the desired course on the compass card. This knob corresponded to an Omni Bearing Selector (OBS) on standard VOR indicators. The HSI had a Heading Select Bug, which was a movable orange marker on the outer perimeter of the compass display, used primarily to select the desired heading you wished to fly. This d...
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# CHI07FA068