McDonnell Douglas DC-9-83 (MD-83) N877GA

Summary

On 29 March 2007 at about 20:16 local time, a McDonnell Douglas DC-9-83 (MD-83) registered N877GA, operated by Allegiant Air LLC, was involved in an accident near Sanford, Florida, United States. 157 people were on board and one had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

29 March 2007 at 20:16

Classification

Accident

Location

Sanford, Florida, United States

Nearest airport

Orlando Sandford Intl Airport (SFB)

Coordinates

28.7683, -81.2375

Aircraft

McDonnell Douglas DC-9-83 (MD-83)

Registration

N877GA

Category

Airplane

Engines

2

Operator

Allegiant Air LLC

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Portsmouth → Sanford

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

MIA07LA068

1 person had minor injuries.

The flight crew's failure to complete the checklist and adhere to airplane placards. Contributing to the accident was a separation of a B-nut on the rudder power hydraulic shut off valve for undetermined reasons.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The flight crew (FC) was in cruise flight when a master caution light illuminated indicating a loss of the right hydraulic system pressure and hydraulic fluid. The FC used the checklist to trouble shoot the system and attempted to manually extend the main and nose landing gear (NLG) using the alternate extension control lever. Both main gear extended and locked into place; however the NLG did not extend. The airplane was landed with the NLG in the retracted position. Initial inspection of the airplane revealed that a B-nut to the check valve on the rudder power hydraulic shut off valve, was separated from the valve resulting in a total loss of right hydraulic quantity and pressure. Examination of the hydraulic tube, including the B-nut and check valve, did not reveal any abnormalities. Examination of the cockpit revealed the landing gear handle was in the stowed position. A placard on the alternate landing gear extension lever stated, "Pull up forcibly Full Stroke." The airplane was placed on jacks and maintenance personnel successfully extended the nose landing gear. The alternate gear extension control system was also inspected and no defects were noted.

Quoted verbatim from the NTSB record.