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Proper DL MD-88 Instrument Shutdown Question.  
User currently offlineJmhluv2fly From United States of America, joined Dec 1999, 559 posts, RR: 0
Posted (8 years 1 month 3 weeks 2 days 9 hours ago) and read 2767 times:

This question is for those who are very familiar with how to operate MD-88's, with DL 88 pilots and DL mechanics in mind I suppose.
Here is the deal, last night, in Pensacola Florida Delta had two terminating
88's. I work on the ramp and am employed with the company that supports ramp services for DL in PNS. The airplanes pull in, we hook up the jetbridge power all is fine and great. At the end of the evening when we are prepared to leave, we precede to remove external power to both both a/c. On one of them, when power is removed a horn suddenly sounds, with closer inspection the emergency lighting is on, ie. battery power is being used. We all look at each other, and say anybody know how to turn off the battery power...uhhh..nope. I run and get some help from NWA, and a guy who has previous piloting experiece gives the flight deck a look over, he finally is able to get the emergency lighting to go off, but the master warning light in red is still on and the horn is still sounding, we didnt know what else to do and left with it like it was...so what exactly was going on here? Is the 88 somewhat difficult to shutdown properly? I remember a few weeks ago, a terminating crew struggled to get the airplane to shutdown right, we had to wait for them in the jetbridge (prior to cleaning) while they kept turning system on and off, and it would say "Auto pilot" and then off again and repeated it several times...so what gives on the ageing 88 birds?
Thanks for any info, hope all goes well in the morning for DL flight 1629.

JMH

3 replies: All unread, jump to last
 
User currently offlineJmhLUV2fly From United States of America, joined Dec 1999, 559 posts, RR: 0
Reply 1, posted (8 years 1 month 3 weeks 2 days 9 hours ago) and read 2763 times:

****I have posted this question in the tech ops section as well, I am hoping some professionals might can shed some light on the subject in this forum as well, hopefully no one will suggest a deletion from this forum, just looking for some answers, thanks.***

JMH


User currently offlineTu154m From United States of America, joined Oct 2001, 673 posts, RR: 5
Reply 2, posted (8 years 1 month 3 weeks 2 days 9 hours ago) and read 2761 times:

JMH.......sounds like the crew didn't follow their checklist(imagine that!!!). Sounds like they left the emergency lights or the IRUs on. You should've let the batteries go dead. Then the crew would've had to explain why the batteries were dead and why the morning departure was waiting on Mtc from ATL!!!!!


CEOs should swim with cement flippers!
User currently offlineDl757md From United States of America, joined May 2004, 1562 posts, RR: 16
Reply 3, posted (8 years 1 month 3 weeks 2 days 8 hours ago) and read 2738 times:

The emergency lights were left armed so when you shut off power they automatically turned on. They have their own battery packs so turning off the main aircraft battery switch in the cockpit won't help. You have to turn the emergency light switch to disarm to prevent this. This is normal on all Delta aircraft and others that I know of.

The horn that you heard is the IRU warning horn that sounds when you remove power from the aircraft and the IRUs are left on. The remedy is either turn off the IRUs or restore power to the aircraft. Again this is true of all Delta aircraft.

It is true that the crew should have disarmed the emergency lights and shutdown the IRUs if they knew the aircraft was going to overnight there. You did the right thing however by rectifying the situation. The pilots would have turned it right back around and probably would have dumped responsibility for it back in your lap had there been a delay becasue of it. You can still contact the chief pilot at the nearest pilot domicile and let them know the specifics of the incident. The crew responsible will be informed of their oversight and that will be the end of it. Likely the same outcome (for the pilots anyway) that would have happened if you had let it affect the operation.

Finally, the situation you encountered was normal operation for the Md-88.
As for the crew that had trouble shutting down the other aircraft I would guess that if they didn't write anything up in the logbook then they realized in the end that were doing something wrong. There has been a lot of shuffling of pilots between fleet types at Delta as of late. Accordingly, it's possible the crew wasn't as familiar with the shutdown procedures for the aircraft as they should be. Crews always leave the aircraft powered up when it's going back out soon, which is most of the time, so they don't get as much practice "putting one to bed" as you might think.

DL757Md



757 Most beautiful airliner in the sky!
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