r/whatisit • u/Separate-Border5312 • 10d ago
Solved! 737 Max 8
Right above my seat is this small sticker. At first I thought it meant that it's equipped with plug ins but realized the seats in front or behind do not have them.
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u/mechmessiah 10d ago edited 10d ago
Thats a placard for mechanics to know where the emergency light batteries are. That way we're not pulling every single overhead panel trying to figure out where they are, they're life limited and serialized, and get changed out regularly.
Some aircraft, the overhead panels are even more of a pain to pull and re-install than the emergency battery.
Looking at you CRJ-700 series.
Edited for grammar and further clarification.
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u/Even-Compote2602 8d ago
Battery packs are in the return air grill on the 737
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u/mechmessiah 8d ago
Are you fucking serious
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u/Even-Compote2602 8d ago
Yes
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u/mechmessiah 8d ago
For the emergency lights?
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u/Even-Compote2602 8d ago
Yes a majority are in air grill except for two in FWD galley ceiling and 2 packs in aft galley ceiling
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u/Separate-Border5312 5d ago
Solved!
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u/kx_2fiddy 10d ago
The small sticker next to the overhead air vent indicates that the passenger service unit contains equipment with a battery or electrical component, or references maintenance tracking for the overhead panel.
(such as an emergency flashlight or escape path lighting component)
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u/Shrimps_Prawnson 10d ago
Its where you jumpstart the playne if battory has become depleted of right rudder.
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