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Pressure Gauge Near APU On 737

UAL Bagsmasher From United States of America, joined Sep 1999, 2130 posts, RR: 11
Posted (11 years 11 months 2 days 5 hours ago) and read 1313 times:

Today I noticed a pressure gauge on the underside of the fuselage of a B737-300. It was underneath the APU. Anyone know the function of this gauge?

7 replies: All unread, jump to last

JT-8D From United States of America, joined Dec 2000, 423 posts, RR: 3
Reply 1, posted (11 years 11 months 2 days 5 hours ago) and read 1288 times:

Maybe the apu fire bottle pressure? Our planes dont have it, but there are lots of options available..JT

Wilcharl From United States of America, joined Jun 2000, 1158 posts, RR: 3
Reply 2, posted (11 years 11 months 2 days 4 hours ago) and read 1279 times:

JT8-D wins the prize!
If you go back to my questions on the blow out disks, and there was a link that had a picture of one.

UAL Bagsmasher From United States of America, joined Sep 1999, 2130 posts, RR: 11
Reply 3, posted (11 years 11 months 2 days 4 hours ago) and read 1268 times:

Thanks guys!

Cdfmxtech From United States of America, joined Jul 2000, 1338 posts, RR: 29
Reply 4, posted (11 years 11 months 1 day 10 hours ago) and read 1243 times:

UAL Bags - was the APU compartment door and shroud open...or was it closed. Because if it was open...then u probably saw the APU hourmeter. If not, then there are no pressure gauges. Unless u ARE talkin' about those disks.

Yaki1 From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 11 months 14 hours ago) and read 1228 times:

I agree with JT-8D, our 737's have externally visible pressure gauges for the APU firebottles.

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 6, posted (11 years 10 months 3 weeks 5 days 20 hours ago) and read 1205 times:

In case the APU fire bottle Pressure gage is not installed.How do you know that the pressure is below minimum [I know discharge will be indicated by pr sw on Fire control panel in cockpit]
Is there any special checks like weighing the Bottle once a day etc.
Whats the MEL say for a U/s Apu pr gage,is the APU declared U/s.
Anyone.
regds.
HAWK.

Think of the brighter side!

JT-8D From United States of America, joined Dec 2000, 423 posts, RR: 3
Reply 7, posted (11 years 10 months 3 weeks 5 days 15 hours ago) and read 1202 times:

Hawk, there is a door on the left side. You have to crawl inside and read the gauge. Its a mess in there too--lol..JT

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