No need to say anything. The words painted on the WAG-7 convey the message clearly to all. The Test charge on the KYN-LTT section was carried out successfully on 30-12-2012 (Kaushik Dharwadkar)

Date: 2012-12-30
Owner: Kaushik Dharwadkar
Size:
Full size: 1600x1203

Photo Properties
Summary  Details
Make Canon Model Canon PowerShot SX130 IS
Aperture Value f/3.5 Color Space sRGB
Flash No Flash ISO 100
Metering Mode Multi-Segment Shutter Speed Value 1/1000 sec
Digital Zoom Ratio 1 Date/Time 2012 Dec 30 03:16:14 +0000

Comments
@Anant, a few months ago due to diversion via DD some NE trains came to LTT with AC locos in powered down mode. But 27136 is probably the first live pure AC loco to visit LTT.
Posted by Anamitra Ghatak on 2013 Jan 04 16:09:30 +0000
On that day the pair was used for test charge of KYN-TNA section only. As per news items, TNA-LTT was done on previous midnight.
Posted by Shantanu Kulkarni on 2013 Jan 04 13:15:53 +0000
So is 27136 first pure AC loco to enter LTT?
Posted by Anant K Singh on 2013 Jan 03 04:57:36 +0000