DCA85AA037

NTSB accident investigation · Beech B99 · Grottoes, VA · September 23, 1985

Accident · FatalFinal report
Date
September 23, 1985, 10:20 local (14:20 UTC)
Place
Grottoes, VA
Injuries
14 fatal
Damage
Destroyed
Phase of flight
Approach
Aircraft
N339HABeech B99
Weather
Instrument (IMC) · Day
Status
Completed
Report
Board-adopted at Board Meeting
NTSB office
Major Investigations Division
FAA report
19850923077429A
Case key
15839

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with terrain/waterApproach
Fuselage,crew compartment - otherFactor
Communications - poorFactor
Flight/nav instruments - incorrectFactor
Maintenance,installation - improperFactor
Weather condition - low ceilingFactor
Weather condition - fogFactor
Ifr procedure - improperPilot in commandCause
Flight/navigation instrument(s) - improper use ofPilot in commandCause
Became lost/disoriented - inadvertentCause
Proper alignment - not maintainedCause
Terrain condition - mountainous/hillyFactor
Unsafe/hazardous condition - not identifiedCause
Inadequate trainingPilot in commandFactor
Inadequate trainingCopilot/second pilotFactor
Lack of total experience in type operationPilot in commandFactor
Lack of total experience in type operationCopilot/second pilotFactor
Inadequate surveillance of operationFaa(organization)Factor

Analysis

Acft arr fm the NE, crossed ovr the arpt in IMC conds & contd twd the sw to the initial apch fix (iaf) for an ILS rwy 4 apch. The iaf was ovr the outer marker (om), 4.2 mi sw of the arpt. As the acft deptd the iaf, it contd outbnd twd the sw on an imprecise track for aprx 1 min, made a procedure turn (pt) by turning rgt (west), then back left (east) twd the localizer (LOC). Inbnd hdg for the LOC was 045 deg. Radar contact was lost drg the pt. As the pt was completed, the acft angled to the east of the LOC & intercepted the 045 deg radial of the montebello (mol) VOR. Subsequently, the acft hit a mtn top while in lvl flt at 2400' along the mol 045 radial. Cld bases were at aprx 2000'. No preimpact part prblm was fnd. Acft rdo instln was nonstandard, not FAA approved; 1 adf & 2 nav displays were in unsuit location for coplt. Rdo transcript indcd plts were uncertain of geographic psn bfr impact. Company plt exp reduced by recent plt turnover. Both plts had lmtd exp in respective psns. Hi noise lvl in cockpit made conversation difficult. Lack of FAA surveillance

Aircraft

Registration
N339HA
Reported as
Beech B99
Category
Airplane
Serial number
U-156
Engine
P&W PT6A-27, 680 horsepower, turbo prop
Damage
Destroyed
Fire
On-Ground
Flight
Part 135
Registered owner
Henson Airlines
Airworthiness certificate
Standard, Normal
Departed
BWI · Baltimore, MD
Flight plan
IFR
Airport
SHD · Shenandoah Valley, runway 4, 6,002 × 150 ft, asphalt

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
27
Certificates
Flight instructor, Commercial, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
3,447 total · 301 in this make and model · 2,428 as pilot in command · 240 in the last 90 days · 90 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Wind
Calm
Visibility
2 statute miles
Temperature
63 °F, dew point -0 °F
Altimeter
30.00 inHg
Observed at
SHD, 6 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.