ASN logo
Accident
Last updated: 19 October 2017
Status:Definitief
Datum:zondag 15 juni 2014
Tijd:20:44
Type:Silhouette image of generic P2 model; specific model in this crash may look slightly different
Lockheed SP-2H Neptune
Operator:Minden Air Corporation
On behalf of:U.S. Forest Service
Registratie: N4692A
Constructienummer: 726-7247
Bouwjaar: 1961
Aantal vlieguren:10484
Motoren: 2 Wright R-3350-32WA Cyclone
Bemanning:slachtoffers: 0 / inzittenden: 2
Passagiers:slachtoffers: 0 / inzittenden: 0
Totaal:slachtoffers: 0 / inzittenden: 2
Schade: Groot
Gevolgen: Written off (damaged beyond repair)
Plaats:Fresno Yosemite International Airport, CA (FAT) (   Verenigde Staten)
Fase: Landing (LDG)
Soort vlucht:Brandblusvlucht
Vliegveld van vertrek:Porterville Airport, CA (PTV/KPTV), Verenigde Staten
Vliegveld van aankomst:Porterville Airport, CA (PTV/KPTV), Verenigde Staten
Beschrijving:
A Lockheed SP-2H, N4692A, was substantially damaged when the nose wheel landing gear collapsed during landing roll at the
Fresno Yosemite International Airport (FAT), Fresno, California. The airplane was registered to Minden Air Corporation and operated as Tanker 48 by the United States Department of Agriculture (USDA), Forestry Service.
The captain reported that following an uneventful aerial drop, the flight was returning to Porterville. During the descent check, he noticed that the hydraulic pressure indicated 0 and that the first officer subsequently verified that the sight gauge for the main hydraulic fluid reservoir was empty. The first officer opened the jet engine doors successfully as the captain selected gear down with no response. The captain notified base personnel at Porterville of the situation, and informed them that they would be orbiting to the east of the airport to troubleshoot. The captain and first officer performed the emergency checklist, and verified that the nose wheel landing gear was extended. The captain stated that the first officer then installed the pin in the nose wheel landing gear as part of the emergency checklist.
The flight diverted to Fresno due to a longer runway and emergency resources as both pilots briefed the no-flap landing procedure, airspeeds, and approach profile. As the flight continued toward Fresno, the flight crew informed Fresno Approach Control of the hydraulic system failure, and continued to perform the emergency gear extension checklist. The first officer extended the main landing gear using the emergency gear release, which resulted in three down and locked landing gear indications in the cockpit. As the flight neared Fresno, the first officer added 2 gallons of hydraulic fluid to the main hydraulic reservoir while the captain attempted to extend the flaps unsuccessfully. Subsequently, the flight landed normally on runway 26R.
During the landing roll, the nose wheel landing gear collapsed, and the airplane came to rest nose low.
The first officer reported that following completion of the emergency nose gear extension checklist, he physically inserted the nose gear pin in place prior to the landing at Fresno.
Examination of the airplane by representatives from the Forest Service revealed that the forward portion of the fuselage was structurally damaged. The airplane was recovered to a secure location for further examination.

Probable Cause:

PROBABLE CAUSE: "The collapse of the nosewheel landing gear due to the disengagement of the nosewheel landing gear pin. Contributing to the accident was the failure of the main hydraulic system due to overpressurization for reasons that could not be determined during postaccident examination of the airplane. "

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 1 year and 3 months
Accident number: WPR14TA248
Download report: Summary report

Bronnen:
» NTSB


Foto's

photo of Lockheed SP-2H Neptune N4692A
Add your photo of this accident or aircraft
 

Kaart

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
languages: languages

Share