An aircraft maintenance technician (amt) reports that a company escape slide safety checklist may no...

Narrative:

Company air carrier's escape slide safety checklist may not provide adequate protections on boeing 747-400 aircraft to prevent a slide deployment while a main entry door (med) task is in progress. During a review of the aircraft maintenance manual (amm) 12-21-11; I noticed that the 'warning' in amm 12-21-11; section 2; H; (1) informs the mechanic to install a safety pin into the door emergency power reservoir (EPR) bottle. After the pin is installed; this amm is for girt bar servicing; maintenance can be done. However; the second part of the task asks the mechanic to place the door mode selector lever into the 'armed' position (amm 12-21-11; 2; H; (5); (d)) for cleaning and lubrication of the girt bar locks. There is a different 'warning' informing the mechanic to: 'turn the handle slowly to the necessary limit; if you turn the handle and open the door the escape system will operate; this can cause injury or damage.' if the escape system operates; the slide raft may deploy since the [slide] girt bar locks are in the floor fittings at this point of the task. Amm 25-69-03; 3 has the same two warnings; section has the same warnings and even a section on what to do if the slide raft pack opens (amm 25-69-03; 2). No resolution at this time.

Original NASA ASRS Text

Title: An Aircraft Maintenance Technician (AMT) reports that a company Escape Slide Safety Checklist may not provide adequate protections for mechanics on their B747-400 aircraft when performing the cleaning and lubrication of the door slide Girt Bar and floor fittings.

Narrative: Company Air Carrier's Escape Slide Safety Checklist may not provide adequate protections on Boeing 747-400 aircraft to prevent a slide deployment while a Main Entry Door (MED) Task is in progress. During a review of the Aircraft Maintenance Manual (AMM) 12-21-11; I noticed that the 'Warning' in AMM 12-21-11; Section 2; H; (1) informs the Mechanic to install a Safety pin into the door Emergency Power Reservoir (EPR) bottle. After the pin is installed; this AMM is for Girt Bar Servicing; Maintenance can be done. However; the second part of the Task asks the Mechanic to place the door Mode Selector Lever into the 'Armed' position (AMM 12-21-11; 2; H; (5); (d)) for cleaning and lubrication of the girt bar locks. There is a different 'Warning' informing the Mechanic to: 'turn the handle slowly to the necessary limit; if you turn the handle and open the door the Escape System will operate; this can cause injury or damage.' If the Escape System operates; the slide raft may deploy since the [slide] girt bar locks are in the floor fittings at this point of the task. AMM 25-69-03; 3 has the same two warnings; section has the same warnings and even a section on what to do if the slide raft pack opens (AMM 25-69-03; 2). No resolution at this time.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1161504
Time
Date	201403
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Exterior Pax/Crew Door
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Experience	Maintenance Technician 32
Events
Anomaly	Aircraft Equipment Problem Critical

An aircraft maintenance technician (amt) reports that a company escape slide safety checklist may not provide adequate protections for mechanics on their B747-400 aircraft when performing the cleaning and lubrication of the door slide girt bar and floor fittings.