Date: Wed, 14 Feb 2024 15:34:03 -0700 Subject: Re: APO 2.5m Building issue - Telescope Update 2/14 From: Jamey Eriksen > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3790769648_336665395 Content-type: text/plain; charset="UTF-8" Content-transfer-encoding: quoted-printable =20 Hi all, =20 You may have seen in the 2.5m Day log that John Downey sent out, the 2.5m b= uilding has been repaired and tested and is ready for observations tonight. =20 Great work by John and his crew to get the wheel truck out, repaired and re= installed today!=C2=A0=20 =20 -Jamey =20 =20 =20 From: Jamey Eriksen Date: Tuesday, February 13, 2024 at 12:59=E2=80=AFPM To: sdss5-mc , "2.5m Day Log" Cc: Subject: FW: APO 2.5m Building issue - Telescope down 2/13 =20 Forwarding this to MC and APO day/night logs for distribution as well =20 =20 Hi all, =20 The nightly report had noted=20 =20 2. NE truck was particularly angry tonight. Perhaps not bei= ng exercised last couple days or the cold weather. Difference from what I've= heard before was that it was not clanking rhythmically. =20 Investigations of this new noise/different behavior have found that a beari= ng has failed in the non drive wheel on the NE corner drive system of the bu= ilding. Building should not be moved with this bearing failure as there is = a risk of a catastrophic situation occurring that would prevent the building= from being able to be moved. (the other wheel in the system is the drive w= heel and that is the one that does the clunking that was worked on during sh= utdown) =20 Telescope will be down tonight while repairs are planned and made the rest = of today and tomorrow. =20 =20 We anticipate that repairs will be done in time to open tomorrow night, how= ever, until the drive system is taken apart, the extent of the failure will = not be known. Updates will be sent out as progress is made on the removal a= nd repair of the failed bearing on the non drive wheel. =20 =20 - Jamey =20 --=20 Jamey Eriksen Director, Research Division I Director of Operations, Apache Point Observatory =20 2001 Apache Point Rd. Sunspot, NM 88349 =20 jeriksen@apo.nmsu.edu jeriksen@nmsu.edu =20 =20 --B_3790769648_336665395 Content-type: text/html; charset="UTF-8" Content-transfer-encoding: quoted-printable Hi all,&nb= sp;You may have seen in the 2.5m Day log that J= ohn Downey sent out, the 2.5m building has been repaired and tested and is r= eady for observations tonight. Great work by John and his crew to get the wheel= truck out, repaired and reinstalled today!=C2=A0 -Jamey From= : J= amey Eriksen Date: Tuesday, February= 13, 2024 at 12:59=E2=80=AFPMTo: sdss5-mc , &q= uot;2.5m Day Log" Cc: Subject: FW: APO 2.5m Building issue - Tel= escope down 2/13 Forwarding this to MC an= d APO day/night logs for distribution as well Hi all, The nightly report had noted &nb= sp; 2. NE truck was particularly angry tonight. Perhaps not being exerci= sed last couple days or the cold weather. Difference from what I've heard be= fore was that it was not clanking rhythmically. Investigations of this new noise/different behav= ior have found that a bearing has failed in the non drive wheel on the NE co= rner drive system of the building. Building should not be moved with t= his bearing failure as there is a risk of a catastrophic situation occurring= that would prevent the building from being able to be moved. (the oth= er wheel in the system is the drive wheel and that is the one that does the = clunking that was worked on during shutdown) Telescope will be down tonight while repairs are planne= d and made the rest of today and tomorrow. We anticipate that repairs will be done in time t= o open tomorrow night, however, until the drive system is taken apart, the e= xtent of the failure will not be known. Updates will be sent out as pr= ogress is made on the removal and repair of the failed bearing on the non dr= ive wheel.&= nbsp; - Jamey = -- Jamey EriksenDirector, Research Division IDirector of Operations, Apache = Point Observatory 2001 Apache Point Rd.= Sunspot, NM 88349 jeriksen@apo.nmsu.edujeriksen@nmsu.edu = --B_3790769648_336665395--