Apart from arranging a hydraulic roof, TDB would be replacing the stones in front of the holy steps with granite.
Actor Dileep and his associates, who reached Sabarimala on Sunday, stayed at a guest house and reached the shrine on Monday morning to offer prayers.
There were many shortcomings in the techno-economic feasibility study conducted earlier by KSIDC in association with a US-based consultancy firm.
The move follows a recent meeting convened by V Thulasidas, special officer for the airport project, which expressed doubts over the 2.7-km-long stretch suggested for the runway in the preliminary report for the project.
Several social media handles had claimed that the woman now identified as Madhumati Chukkapalli, wife of industrialist Suresh Chukkapalli, was under 50.
The three were killed after the tempo traveller they were travelling in collided with a tipper lorry at Purakkattiri on the Malaparamba-Vengalam bypass road in the wee hours of Tuesday.
A senior crime branch official told PTI that as per the ASI report eight items, including the Sabarimala 'chembola', are not antiques.
Devaswom officials had estimated that roughly 70,000 pilgrims were present at the hill shrine on the occasion of 'Makaravilakku'
The actor reached the temple by 11 am and sought the blessings of tanthri and melsanthi (chief priest) of the temple.
Two thefts were reported from the 'bhandaram' or the offering box of Lord Ayyappa temple at Sabarimala within a gap of barely a month.